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Operational Performance Measures and
          A PictureBased
             Outcome
                        Book
  AssessmentApproach
              for Arterial Management
          using High Resolution
         to Traffic Data and Database
Controller Data, Probe
                       Signal
           Management
            QA/QC Procedures

               Darcy Bullock
            darcy@purdue.edu
 Purdue University School of Civil Engineering
March 27, 2012: 0830
Why?
Advanced Transportation Information
           Systems (ATIS)
             Messages
                                    Opportunities to
What gets measured gets done,       Push the State of
what gets measured and fed back       the Possible
gets done well,
what gets rewarded gets repeated.
– John E. Jones


Enormous opportunities to fuse data from
• traffic signal controllers and
• probe data sources
Circa 1995 Screen Scrapes
           (PPTs were so old they did not load)
LSU vehicle (25k miles)                                                       I-10/12 Split Segment
                                                                              Coding
                    R D S an t nna
                             e
FM   s ub ca r re r
                i                G P S an t nna
                                          e              S a t llit s gna l
                                                             e e i


                                                                                1001
                                                                                                       7      1005                1004
                                                                                          1002
                                                                                         1006      101
                                                                                                           1003
                                                                               1008                                               1010
                                                                                         1009                       7
                                                                                       101                 10 100
                                                                                           3       10        11
                                                                                                     14                 1018
      RD S                                           T ri b e
                                                       m l                                      10
                     D if fe ren ta lco r re c ton
                                  i             i                                                 15                       10
      300 0                                           P a ce r
                                                         l                                                                   12
                                                        400




                                                                                                                  10
                                                                                                                    16
                            Lap t p
                                o
                           co pu t r
                             m     e

                                                       DG PS da t
                                                                a
Evolution
                  LSU               Early Controller
       CMU     (Denardo            Data (Brute Force
                 Years)




1990                       2000                                2010



        Brute force                                    Performance
         GPS Data          Saban joins                  Measures
                              LSU
October 2006 State of the practice
“If one wants to be outstanding in
there field, one must first spend some
time standing in the field” Bill Kloose
Contributor to this talk
• INDOT (Infrastructure   • Indiana LTAP
  Support and Agency         – Neal Carboneau
  Perspective)               – Jay Grossman (Elkhart
   –   Jim Sturdevant          County)
   –   Jay Wasson         • Andrew Nichols (Marshall
   –   Ryan Gallagher       University)
   –   Greg Richards      • Econolite (ASC 3 Data
• Purdue University         Logger )
   –   Chris Day             –   Gary Duncan
   –   Tom Brennan           –   Eric Raamot
   –   Ross Haseman          –   Lu Ta
   –   Alex Hainen           –   Brian Griggs
   –   Steve Remias
   –   Darcy Bullock

                                                       12
Emerging Shared Vision
                Active Traffic
                   Signal
                                                1. Develop
                Management                         infrastructure and
                                                   procedures to
                                                   systematically
                                                   prioritize investing
                  Agencies
Universities                        Vendors        engineering
                                                   resources
                                                2. Assess that impact
    We are in a period where we need to re-
   introduce theory and fundamentals so we
  change how agencies spec. & operate traffic
      signals and what vendors provide and
True or False
On Average, we have no capacity problems at any
signalized intersection?
                                                                 250




                                                                 200




                                         Counts per 15 minutes
                                                                 150




                                                                 100




                                                                 50




                                                                  0
                                                                       0:00   2:00   4:00   6:00   8:00   10:00   12:00   14:00   16:00   18:00   20:00   22:00
                                                                                                             Time of Day
15-Minute Counts (Phase “n”)

                        250




                        200
Counts per 15 minutes




                        150




                        100




                        50




                         0
                              0:00   2:00   4:00   6:00   8:00   10:00   12:00   14:00   16:00   18:00   20:00   22:00
                                                                    Time of Day
                                                                                                                         15
Challenge
How can we use controller and probe data to quantify
what we can see and assess if we can improve.
Outline
• Signal Management/ Challenges
• Data Sources
    – Controller
    – Probe Vehicles
•   Fundamentals
•   Data ->Information to assess fundamentals
•   Results
•   Q&A..Dialog          Don’t wait
                         until the End
INDOT Signal Network


Question

• Where (and when) are
  the opportunities to
  improve signal
  operations?

     INDOT: 2,600 signals in 300 systems
     Nationwide: 350,000 signals
     Globally: who knows?




18
~350,000 Traffic Signals…We need systematic
procedures for identifying operational
problems…and fixing them using controller and
probe data.
Chicago




Typical Corridor (22 Intersections)
                                                                                                                                                            80
                                                                                                 65
                                                                                                           65
                                                                                                                                                         65


                                                                                                                                                       Lafayette




                    74,000                                                                                                                                Indianapo


                Parameters/int                                                                                                                            70
                                                                                                                                         N
                                                                     Map Area
        Isolated                                            Indianapolis, IN                    65

    (Free) Operation

                                          Coordinated
                                           Operation



         1                                                                       65

                    2
                           3                     US30                                                       d) 5 ft antenna

                               4   5         6               8         10   12        65              18
                                                                                                 2000 ft        20                  22
                                                                                 14        16
                                                                                                 500 m
                                                                                                                e) 7.5 ft antenna




                                   US30                                                                                                        d) 5 ft antenna

N        4,000 FT
         1,000 M                                        7        9       11 65 15
                                                                             13                 17         19          21
                                                                                                                                                   e) 7.5 ft antenn
                                                                                                                      2000 ft
                                                                                                                      500 m


                    US30                                                                                                                     d) 5 ft antenna
~74,000 Configurable
Parameters/Int                                                          192M
                                                                      Statewide!



                                                           ~1.6M
                                                         Parameters

                                        Default
                                       Database

                                             Default Database Query
                                              of Each Intersection



1   2   3   4   5   6   7   8    9   10 11 12 13 14 15 16 17 18 19 20 21 22


                            Longitudinal Query of Intersection
                                  Controller Databases
So how many do we really use?
                               3200
                                              Isolated               Coordinated                                                   Vendor Specific
                               3000       (Free) Operation            Operation
                                                                                                                                   NTCIP 1202
                               2800

                               2600

                               2400
 COUNT OF ALTERED PARAMETERS




                               2200

                               2000

                               1800

                               1600

                               1400

                               1200

                               1000

                               800

                               600

                               400

                               200

                                 0
                                      1      2   3    4      5   6    7    8     9   10   11   12   13   14   15   16   17   18   19   20   21   22

                                                                               INTERSECTION ID
Traffic Signal Timing Process
                                Opportunity                         Today’s
                                                                    Message



      I.              II.            III.          IV.            V.           VI.
   Define         Assembly        Software    Timing Design   Deployment      Assess
 Objectives,    relevant data     Modeling      and Docu-
 Assess and      to support                     mentation
  Prioritize     timing and
activities by       docu-
Time of Day      mentation
and location      objectives
Outline
• Signal Management/ Challenges
• Data Sources
    – Controller
    – Probe Vehicles
•   Fundamentals
•   Data ->Information to assess fundamentals
•   Results
•   Q&A..Dialog
Historical data collection (~1,000:1)
averages out all of the information
                             Typical less then 500
                              average values/day
                                sent to Traffic
    ~500,000                 Management Centers
   Events/day                (and those are rarely
                                   archived)
Easter Weekend: Southbound
Example 40 min travel time sample
                       Observed at 18:10
 ~MM 244




                             ~40
 ~MM 220                     minutes

                       Observed at 18:50
Easter Weekend
Southbound Travel Time (~24 miles)
                             140
                                     Friday           Saturday             Sunday           Monday
                             120
  SB Travel Time (minutes)




                                                         Approximately
                                                         1 hour of delay                           Diversions on
                             100                                                                   State/Local Roads

                              80

                              60                             Normal Travel
                                                             Time ~ 22 minutes
                              40

                              20

                               0
                             4/10/09 0:00     4/11/09 0:00       4/12/09 0:00       4/13/09 0:00     4/14/09 0:00
Sample SR 32 Arterial Data




                       SR 32 Instrumented
                       Arterial from SR 238
                             to SR 37
Econolite ASC 3
Bluetooth
 Antenna
            with Indiana Data
             Logger Enabled
                                 SR 32 @ SR 238




                                                  Bluetooth Data
                                Ethernet Switch
                                                      Logger
SR-37 Travel Times
                    10
                              Perhaps
                    9
                           Opportunity to
                    8
                            improve on
                             Saturday
                    7
Travel Time (min)




                    6

                    5

                    4

                    3

                    2

                    1
                                                                                                     Perhaps
                         M T     W Th F Sa Su M T                   W Th F Sa Su                  Opportunity to
                    0
                     6/15 6/16 6/17 6/18 6/19 6/20 6/21 6/22 6/23 6/24 6/25 6/26 6/27 6/28 6/29    improve on
                                                                                                    Saturday
Outline
• Signal Management/ Timing overview
• Data Sources
    – Controller
    – Probe Vehicles
•   Fundamentals
•   Data ->Information to assess fundamentals
•   Results
•   Q&A..Dialog
Highway Capacity Manual Delay
                   Equation
                                                                         Oversaturation
                         d       d1 PF             d2      d3            (Split Failures)


                                           2
                             g    ,a
                                                                1 P ,a
                0.5C 1                             PF ,a                     fPA
                             Ca                                     g   ,a
d1, ,a                                                          1
                                       g   ,a
                                                                    C
            1    min 1 X
                      ,      ,a
                                       Ca

1   Capacity Utilization
    (Volume-to-Capacity Ratio)
                                                Quality of Progression
                                                (Percent on Green)
                                                                             2
Coordination:
                    Split, Cycle, Offset

           5L

                                       Cycle
                                                    Really Hard
           4L                                      to get perfect
                                                       for 22
                                                   Intersections
Distance




           3L


           2L


           L
                1         2             3      4
                           Time (cycles)
Coordination:
                    Split, Cycle, Offset

           5L


                                                  Phone calls
           4L
                                                  work pretty
                                                     well
Distance




           3L


           2L
                                      Split

           L
                1         2             3     4
                           Time (cycles)
Coordination:
                      Split, Cycle, Offset

             5L


                                                  Tuning is
             4L
                                                    labor
                                                  intensive
  Distance




             3L


             2L
Offset

             L
                  1         2             3   4
                             Time (cycles)
Coordination:
                      Split, Cycle, Offset                 74,000
                                                     parameters, 1000’s
                                                     of opportunities to
                                                       make mistakes
             5L

                                         Cycle
             4L
  Distance




             3L


             2L
Offset                                  Split

             L
                  1         2             3      4
                             Time (cycles)
Operational Performance Measures and
          A PictureBased
             Outcome
                        Book
  AssessmentApproach
              for Arterial Management
          using High Resolution
         to Traffic Data and Database
Controller Data, Probe
                       Signal
           Management
            QA/QC Procedures
Outline
• Signal Management/ Challenges
• Data Sources
    – Controller
    – Probe Vehicles
•   Fundamentals
•   Data ->Information to assess fundamentals
•   Results
•   Q&A..Dialog
Purdue Coordination Diagram Construction (PCD)
Loop
Detection

                                                                                              Time in cycle

                                                                                              120                                         Cycle
                                                                                                                                          boundary



                                                                                               90                                         Red

                                                     Green phase ends                          70
                                                                                                                                                Green
   Cycle begins




                                                                                                                                                window
                          phase begins




                                                                          Cycle ends
                          Green




                                                                                               50                                         Green




                                                                                       time


                                                                                                0
  0 sec                  50 sec                     90 sec               120 sec
12:00:00                                                                12:02:00                                                                time of day
                                                                                                         12:00:00



                                                                                                                    12:01:10


                                                                                                                               12:02:00
                                          70 sec
                                         12:01:10
a
                                                                                c383

                                                                                c384


                                                            f




                   c
                                                                            g




     b
                                        e

                              d
                                                                                c385

                                                                                c386

                                                                                c387

                                                                                c388




                   i
                                                                                c389

                                                                                c390
                                        h




                                                                                c391

                                                                                c392

                                                                                c393

                                                                                c394

                                                                                c395

                                                                                c396
                                                                                c397
     Phase 3
                    Phase 4
                              Phase 1
                                                                Clearance




                                            Phase 2 Green




52




               Phase 2 Red
Timing Plan Pattern

1                24 Hour 3Overview
                     2      4  5 6        7   8



        20-pt.
    moving average




                                     b2

                               a2


                               a1
                                     b1




                                                  53
NB @ Pleasant
                     NB @ SR 238
                                               Travel Times
                    10

                     9

                     8

                     7
Travel Time (min)




                     6
                    Better Progression
                     5

                     4

                     3

                     2

                     1
                                                                                                Perhaps
                           M T      W Th F Sa Su M T              W Th F Sa Su               Opportunity to
                     0
                         6/1 6/2 6/3 6/4 6/5 6/6 6/7 6/8 6/9 6/10 6/11 6/12 6/13 6/14 6/15    improve on
                                                                                               Saturday
Saturday Offset Adjustment
                            SR 32   good
Random
arrivals


                         Pleasant
   No
platoons
                                        bad

                         Town &
                         Country
 good                                   good




 bad                  Greenfield
                                        bad

                                               55
Three Poor Offsets
NB @ 37/Pleasant       SB @ 37/Greenfield   NB @ 37/Greenfield




                                                             56
Offset Adjustments on Middle Segment
                          SR 32      good
Random
arrivals


                       Pleasant
   No
platoons
                                     bad

                       Town &
                       Country
 good                                 good




 bad                Greenfield
                                      bad

                                             57
Offset Adjustments on Middle Segment
•   Northbound at 37/Pleasant is bad. The platoon is captured in red.
•   However, any offset adjustments that we make will also impact Southbound progression at
    37/Town and Country (intersection to south) by shifting arrivals.
•   We can mitigate any impacts at 32/37 (intersection to north) by adjusting its offset to keep it fixed
    relative to 37/Pleasant.

NB @ 37/Pleasant                                          SB @ 37/Town and Country
                              POG = 40.1%                                               POG = 80.2%




                               5069 arrivals on green
                               (0600-2200)
                                                                                                     58
Add 10 seconds at 37/Pleasant
•   Green times will occur 10 seconds earlier at 37 & Pleasant
     –   Equivalent to vehicles arriving 10 seconds later
•   Southbound vehicles will arrive 10 seconds earlier at 37 & Town and Country




NB @ 37/Pleasant                                            SB @ 37/Town and Country
                                 POG = 55.4%                                      POG = 77.8%




                                  5589 arrivals on green

                                                                                           59
Add 20 seconds at 37/Pleasant
•   Green times will occur 20 seconds earlier at 37 & Pleasant
     –   Equivalent to vehicles arriving 20 seconds later
•   Southbound vehicles will arrive 20 seconds earlier at 37 & Town and Country




NB @ 37/Pleasant                                            SB @ 37/Town and Country
                                 POG = 67.4%                                      POG = 68.8%




                                  5688 arrivals on green

                                                                                           60
Add 30 seconds at 37/Pleasant
•   Green times will occur 30 seconds earlier at 37 & Pleasant
     –   Equivalent to vehicles arriving 30 seconds later
•   Southbound vehicles will arrive 30 seconds earlier at 37 & Town and Country




NB @ 37/Pleasant                                            SB @ 37/Town and Country
                                 POG = 73.4%                                      POG = 57.5%




                                  5446 arrivals on green

                                                                                           61
Comparison with original (actual “before” case)
                           SR 32        good




                        Pleasant



                                        bad

                        Town &
                        Country
  good                                   good




  bad                Greenfield
                                         bad

                                                62
Predicted Vehicle Distributions with Offset Adjustments

                               SR 32           Unchanged




                            Pleasant



                                               Better

                            Town &
                            Country
 Still OK                                       Still OK




 Better                  Greenfield
                                                Better

                                                           63
Outline
• Signal Management/ Timing overview
• Data Sources
    – Controller
    – Probe Vehicles
•   Fundamentals
•   Data ->Information to assess fundamentals
•   Results
•   Q&A..Dialog
So..did it have an impact.
SB, SR 37 / SR 32                            NB, SR 37 / SR 32




Before    d
                                            1001




         0600          1400          2200             0600          1400          2200
                SB, SR 37 / Pleasant                         NB, SR 37 / Pleasant

                                            1002

                                                                                    a


         0600          1400          2200             0600          1400          2200
          SB, SR 37 / Town & Country                  NB, SR 37 / Town & Country

                                            1003




         0600          1400          2200             0600          1400          2200
              SB, SR 37 / Greenfield                     NB, SR 37 / Greenfield


           c
                                               1004      b


         0600          1400          2200             0600          1400          2200
SB, SR 37 / SR 32                            NB, SR 37 / SR 32


                                                               e
After    d
                                             1001




        0600            1400          2200             0600          1400          2200
                 SB, SR 37 / Pleasant                         NB, SR 37 / Pleasant
                                                                                     a
                                             1002


                  z                                           z


        0600            1400          2200             0600          1400          2200
         SB, SR 37 / Town & Country                    NB, SR 37 / Town & Country

                                             1003



             f

        0600            1400          2200             0600          1400          2200
             SB, SR 37 / Greenfield                       NB, SR 37 / Greenfield

                                                              b
          c
                                                1004



        0600            1400          2200             0600          1400          2200
SB, SR 37 / SR 32                            NB, SR 37 / SR 32


                                                                   e
Predicted    d
                                                 1001




            0600            1400          2200             0600          1400          2200
                     SB, SR 37 / Pleasant                         NB, SR 37 / Pleasant
                                                                                         a
                                                 1002




            0600            1400          2200             0600          1400          2200
             SB, SR 37 / Town & Country                    NB, SR 37 / Town & Country

                                                 1003



                 f

            0600            1400          2200             0600          1400          2200
                 SB, SR 37 / Greenfield                       NB, SR 37 / Greenfield

                                                                  b
              c
                                                    1004



            0600            1400          2200             0600          1400          2200
Before
                             9
                                                (Sample size=4797)
                             8

                             7                                        Long Saturday travel
                                                                     times compared to rest
Measured Travel Time (min)




                                                                            of week
                             6

                             5

                             4

                             3

                             2

                             1
                                 Mon Tue Wed Thu     Fri   Sat   Sun Mon Tue Wed Thu          Fri   Sat   Sun
                             0
                              6/15 6/16 6/17 6/18 6/19 6/20 6/21 6/22 6/23 6/24 6/25 6/26 6/27 6/28 6/29
                                                                 Date/Time
After
                             9
                                                (Sample size=5401)
                             8

                             7                                        Saturday travel times
Measured Travel Time (min)




                                                                    comparable to rest of week
                             6

                             5

                             4

                             3

                             2

                             1
                                 Mon Tue Wed Thu     Fri   Sat   Sun Mon Tue Wed Thu             Fri   Sat   Sun
                             0
                              7/13 7/14 7/15 7/16 7/17 7/18 7/19 7/20 7/21 7/22 7/23 7/24 7/25 7/26 7/27
                                                                 Date/Time
Lets Evaluate the Impact
Statistically and Financially
          I.                  II.                III.                IV.              V.        VI.
       Define         Assembly relevant   Software Modeling   Timing Design and   Deployment   Assess
 Objectives, Assess    data to support                         Docu- mentation
   and Prioritize     timing and docu-
 activities by Time       mentation
of Day and location       objectives
NB: June 6, 2009
                 0900-1200 Travel Time Histograms
            60                                                                                                                      100%

                                                                                                                                    90%
            50
                                                                                                                                    80%
                                                                                                      Frequency
                                                                                                                                    70%
            40
                                                                                                      Cumulative %
                                                                                                                                    60%
Frequency




            30                                                                                                                      50%

                                                                                                                                    40%
            20
                                                                                                                                    30%

                                                                                                                                    20%
            10
                                                                                                                                    10%

            0                                                                                                                       0%
                 0   0.5   1   1.5   2   2.5   3   3.5   4   4.5   5   5.5   6   6.5   7   7.5   8   8.5   9   9.5   10 10.5 More



                                               Travel Time Bin (Minutes)
NB: July 18, 2009
                 0900-1200 Travel Time Histograms
            60                                                                                                                      100%

                                                                                                                                    90%
            50
                                                                                                                                    80%
                                                                                                      Frequency
                                                                                                                                    70%
            40
                                                                                                      Cumulative %
                                                                                                                                    60%
Frequency




            30                                                                                                                      50%

                                                                                                                                    40%
            20
                                                                                                                                    30%

                                                                                                                                    20%
            10
                                                                                                                                    10%

            0                                                                                                                       0%
                 0   0.5   1   1.5   2   2.5   3   3.5   4   4.5   5   5.5   6   6.5   7   7.5   8   8.5   9   9.5   10 10.5 More



                                               Travel Time Bin (Minutes)
Before (6/20/09)
 After (7/25/09)
           ~1 min Travel
          Time Reduction
Business Case: SR 37 Timing Improvements
           (Largest Cost Benefit/Reduction/Avoidance)
                                                                                      USER SAVINGS
                                                                                      • Travel time tests for SR37 Corridor
                           1
                                                                                        have improved Northbound Travel
                                                                                        Time by       ~ 1 Minute.
                         0.75
                                                                                      • ~8,500 Cars per Day Are Effected by
Cumulative Probability




                                                                                        this benefit (NB).
                          0.5                                                         • ~0.17 Cents per minute ($10/hour)
                                                                                        saved for each driver in fuel costs and
                                                                                        time value.
                         0.25
                                                                                      • ~1.0 Minutes are assumed saved on
                                                                                        average for the intersection over 1-
                           0                                                            Year with improvements.
                                0   1    2    3      4        5       6   7   8   9
                                                  Travel Time (min)                   • User benefit =
                                        0600 -2200 (8,500 veh)                          (8,500 Veh/Day * $0.17/min * 1-
                                                                                        min/Veh * 2*52 Days/Year )=
                                                                                        $150,000/year for a 1.6 mile stretch
                                                                                        of roadway is realized.
                                                                                                                         76
Southbound                                                                                                  Northbound
                Baseline                      Optimized (Obj. III)                                                          Baseline                      Optimized (Obj. III)
1.0                                 1.0                                                                     1.0                                 1.0
                                                                         1/SB                        1/NB

0.5                                 0.5                                                                     0.5                                 0.5



0.0                                 0.0                                                                     0.0                                 0.0
                                                                                            Int. 1
1.0                                 1.0                                                                     1.0                                 1.0
                                                                         2/SB                        2/NB

0.5                                 0.5                                                  Int. 2             0.5                                 0.5




0.0                                 0.0                                                                     0.0                                 0.0

1.0                                 1.0
                                                                                          Int. 3            1.0                                 1.0
                                                                         3/SB                        3/NB

0.5                                 0.5                                                                     0.5                                 0.5




0.0                                 0.0                                                  Int. 4             0.0                                 0.0
1.0                                 1.0                                                                     1.0                                 1.0
                                                                         4/SB                        4/NB

0.5                                 0.5                                                                     0.5                                 0.5




0.0                                 0.0                                                                     0.0                                 0.0

1.0                                 1.0                                                                     1.0                                 1.0
                                                                         5/SB                        5/NB

0.5                                 0.5                                         Int. 5                      0.5                                 0.5




0.0                                 0.0                                                                     0.0                                 0.0

1.0                                 1.0                                         Int. 6                      1.0                                 1.0
                                                                         6/SB                        6/NB

0.5                                 0.5                                                                     0.5                                 0.5




0.0                                 0.0                                                                     0.0                                 0.0

1.0                                 1.0                                                                     1.0                                 1.0
                                                                         7/SB   Int. 7               7/NB

0.5                                 0.5                                                                     0.5                                 0.5



                                                                                Int. 8
0.0                                 0.0                                                                     0.0                                 0.0

1.0                                 1.0                                                                     1.0                                 1.0
                                                                         8/SB                        8/NB

0.5                                 0.5                                                                     0.5                                 0.5




0.0                                 0.0                                                                     0.0                                 0.0
      0    29      57   86    114         0      29   57    86     114                                            0    29      57   86    114         0      29    57   86      114


          Time in Cycle (s)                    Time in Cycle (s)                                                      Time in Cycle (s)                     Time in Cycle (s)
Travel Time between 4 intersections

100%                                                  100%
                       IV                                                       IV
                   I                                                            III
75%                                                   75%                                         II
                                  II                                        I


50%                                                   50%

                            III
                                       Base                                                Base
25%                                                   25%




 0%                                                    0%
       1       2       3     4          5     6   7          1       2      3         4   5            6   7


           (e) Southbound, Case B to Case C.                     (f) Northbound, Case C to Case B.



  Cumulative frequency diagrams of probe vehicle travel times for alternative objective functions,
                                     Saturday, 1500-1800.
Economic Impact (52 Saturdays)

                              Daily                                                          Annual
                                               CO2                                           CO2
                              Total Time       Emission                                      Emission
                              Saved            Reduction CO2            User          Multi- Reduction   CO2         User
Objective                     (veh-min)        (tons)       Savings     Benefits      plier  (tons)      Savings     Benefits
                                                   (a) System 1, Northern Section
    I            Min Delay             5032           0.71         $16      $1,697       52         37       $810      $88,233
   II   Min Delay and Stops            3813           0.54         $12      $1,286       52         28       $614      $66,864
  III                Max Ng            1760           0.25          $5        $593       52         13       $283      $30,855
  IV            Alt. Max Ng            7883           1.11         $24      $2,658       52         58      $1,268    $138,229
                                                  (b) System 2, Southern Section
    I            Min Delay            24386           3.43         $75      $8,223       52        178      $3,924    $427,614
   II   Min Delay and Stops           25327           3.56         $78      $8,541       52        185      $4,075    $444,111
  III                Max Ng           25147           3.54         $78      $8,480       52        184      $4,046    $440,962
  IV            Alt. Max Ng           26338           3.70         $81      $8,882       52        193      $4,238    $461,845
                                                (c) System 1 and System 2, Arterial
    I            Min Delay            29418           4.14         $91      $9,920       52        215      $4,733    $515,847
   II   Min Delay and Stops           29140           4.10         $90      $9,826       52        213      $4,689    $510,976
  III                Max Ng           26907           3.78         $83      $9,073       52        197      $4,329    $471,817
  IV            Alt. Max Ng           34221           4.81        $106     $11,540       52        250      $5,506    $600,073

                                              Controller PM + Probe Data
Emerging Shared Vision
                Active Traffic
                   Signal
                                                1. Develop
                Management                         infrastructure and
                                                   procedures to
                                                   systematically
                                                   prioritize investing
                  Agencies
Universities                        Vendors        engineering
                                                   resources
                                                2. Assess that impact
    We are in a period where we need to re-
   introduce theory and fundamentals so we
  change how agencies spec. & operate traffic
      signals and what vendors provide and
1



                                                                          $150,000
                                                               0.75




                                      Cumulative Probability
                                                                0.5




                                                               0.25




                                                                 0
                                                                      0   1   2   3      4        5       6   7   8   9
                                                                                      Travel Time (min)


                                                                          0600 -2200 (8,500 veh)

What gets measured gets done,
what gets measured and fed back gets done well,
what gets rewarded gets repeated.
– John E. Jones

                        Darcy Bullock
                     darcy@purdue.edu
           Purdue University School of Civil Engineering
Diagnostics (Jim Sturdevant)
SR37 Fishers/Noblesville- (9)


            Very good 2 way
              progression
Coordination:
                    Split, Cycle, Offset

           5L

                                       Cycle
                                                    Really Hard
           4L                                      to get perfect
                                                       for 22
                                                   Intersections
Distance




           3L


           2L


           L
                1         2             3      4
                           Time (cycles)
US 31 @ 126th (8 in system)
            Plan /cycle
              change
            discrepancy
            from north
Diagnostics (Andrew Nichols)
Thursday (12/8)



           Should we still be
         running coord @ 9pm?
Opportunities
                Active Traffic
                   Signal
                                                1. Hi Resolution
                Management                         Controller Data
                                                   Performance
                                                   Measure
                                                   Picture Book
Universities
                  Agencies
                                    Vendors
                                                   Manual
                                                2. Integrated (but
                                                   independent)
                                                   Probe Data
    We are in a period where we need to re-
   introduce theory and fundamentals so we         Assessment
  change how agencies spec. & operate traffic
      signals and what vendors provide and
Scales well…4 more intersections
added to corridor in Summer 2010
Alternative Objective Functions
                       8                                                                                14




                                                                          Performance Index (veh-h/h)
                       7                                                                                12
                       6
     Delay (veh-h/h)


                                                                                                        10
                       5
                                                                                                         8                         +44
                       4
                                                          +56                                            6
                       3
                                                                                                         4
                       2
                       1                                                                                 2

                       0                                                                                 0
                           0       15    30      45       60    75   90                                       0       15   30      45     60    75   90
                                          Offset Adjustment                                                                 Offset Adjustment

                           (a) Objective I: Estimated delay.                                             (b) Objective II: Delay and stops.

                       600                                                                              400
                                                                                                        350                               +40
                       500


                                                                           Alt. Number on Green
     Number on Green




                                                                                                        300
                       400
                                               +44                                                      250
                       300                                                                              200
                                                                                                        150
                       200
                                                                                                        100
                       100
                                                                                                         50
                           0                                                                                 0
                               0    15    30         45    60   75   90                                           0   15   30       45    60    75   90
                                              Offset Adjustment                                                                 Offset Adjustment

              (c) Objective III: Number of arrivals on                                 (d) Objective IV: Alternative number of
                                green.                                                            arrivals on green.
 1
Southbound                                                                                                  Northbound
                Baseline                      Optimized (Obj. III)                                                          Baseline                      Optimized (Obj. III)
1.0                                 1.0                                                                     1.0                                 1.0
                                                                         1/SB                        1/NB

0.5                                 0.5                                                                     0.5                                 0.5



0.0                                 0.0                                                                     0.0                                 0.0
                                                                                            Int. 1
1.0                                 1.0                                                                     1.0                                 1.0
                                                                         2/SB                        2/NB

0.5                                 0.5                                                  Int. 2             0.5                                 0.5




0.0                                 0.0                                                                     0.0                                 0.0

1.0                                 1.0
                                                                                          Int. 3            1.0                                 1.0
                                                                         3/SB                        3/NB

0.5                                 0.5                                                                     0.5                                 0.5




0.0                                 0.0                                                  Int. 4             0.0                                 0.0
1.0                                 1.0                                                                     1.0                                 1.0
                                                                         4/SB                        4/NB

0.5                                 0.5                                                                     0.5                                 0.5




0.0                                 0.0                                                                     0.0                                 0.0

1.0                                 1.0                                                                     1.0                                 1.0
                                                                         5/SB                        5/NB

0.5                                 0.5                                         Int. 5                      0.5                                 0.5




0.0                                 0.0                                                                     0.0                                 0.0

1.0                                 1.0                                         Int. 6                      1.0                                 1.0
                                                                         6/SB                        6/NB

0.5                                 0.5                                                                     0.5                                 0.5




0.0                                 0.0                                                                     0.0                                 0.0

1.0                                 1.0                                                                     1.0                                 1.0
                                                                         7/SB   Int. 7               7/NB

0.5                                 0.5                                                                     0.5                                 0.5



                                                                                Int. 8
0.0                                 0.0                                                                     0.0                                 0.0

1.0                                 1.0                                                                     1.0                                 1.0
                                                                         8/SB                        8/NB

0.5                                 0.5                                                                     0.5                                 0.5




0.0                                 0.0                                                                     0.0                                 0.0
      0    29      57   86    114         0      29   57    86     114                                            0    29      57   86    114         0      29    57   86      114


          Time in Cycle (s)                    Time in Cycle (s)                                                      Time in Cycle (s)                     Time in Cycle (s)
Travel Time between 4 intersections

100%                                                  100%
                       IV                                                       IV
                   I                                                            III
75%                                                   75%                                         II
                                  II                                        I


50%                                                   50%

                            III
                                       Base                                                Base
25%                                                   25%




 0%                                                    0%
       1       2       3     4          5     6   7          1       2      3         4   5            6   7


           (e) Southbound, Case B to Case C.                     (f) Northbound, Case C to Case B.



  Cumulative frequency diagrams of probe vehicle travel times for alternative objective functions,
                                     Saturday, 1500-1800.
Economic Impact

                              Daily                                                         Annual
                                              CO2                                           CO2
                              Total Time      Emission                                      Emission
                              Saved           Reduction CO2            User          Multi- Reduction   CO2         User
Objective                     (veh-min)       (tons)       Savings     Benefits      plier  (tons)      Savings     Benefits
                                                  (a) System 1, Northern Section
    I            Min Delay             5032          0.71         $16      $1,697       52         37       $810      $88,233
   II   Min Delay and Stops            3813          0.54         $12      $1,286       52         28       $614      $66,864
  III                Max Ng            1760          0.25          $5        $593       52         13       $283      $30,855
  IV            Alt. Max Ng            7883          1.11         $24      $2,658       52         58      $1,268    $138,229
                                                 (b) System 2, Southern Section
    I            Min Delay            24386          3.43         $75      $8,223       52        178      $3,924    $427,614
   II   Min Delay and Stops           25327          3.56         $78      $8,541       52        185      $4,075    $444,111
  III                Max Ng           25147          3.54         $78      $8,480       52        184      $4,046    $440,962
  IV            Alt. Max Ng           26338          3.70         $81      $8,882       52        193      $4,238    $461,845
                                               (c) System 1 and System 2, Arterial
    I            Min Delay            29418          4.14         $91      $9,920       52        215      $4,733    $515,847
   II   Min Delay and Stops           29140          4.10         $90      $9,826       52        213      $4,689    $510,976
  III                Max Ng           26907          3.78         $83      $9,073       52        197      $4,329    $471,817
  IV            Alt. Max Ng           34221          4.81        $106     $11,540       52        250      $5,506    $600,073
Assessing Deployments is Essential
and Possible….we just have to do it
          I.                                               II.                                            III.                 IV.              V.                                                                           VI.
       Define                                      Assembly relevant                               Software Modeling    Timing Design and   Deployment                                                                      Assess
 Objectives, Assess                                 data to support                                                      Docu- mentation
   and Prioritize                                  timing and docu-
 activities by Time                                    mentation
of Day and location                                    objectives




                                                                                                                                                                            9

                                                                                                                                                                            8

                                                                                                                                                                            7                                        Long Saturday travel
                                                                                                                                                                                                                    times compared to rest




                                                                                                                                               Measured Travel Time (min)
                                                                                                                                                                                                                           of week
                                                                                                                                                                            6

                                                                                                                                                                            5

                                                                                                                                                                            4
                                V/C ratio, Northbound approach Phase 2, Noblesville, 07/25/2006
                                                                                                                                                                            3
                                                    Equivalent Hourly Volume
                 2                                                                                                                                                          2
                         Free                AM      Off-        Mid-      Off-      PM            Off-   Free
                                            Peak     Peak        day       Peak     Peak           peak
                                                                                                                                                                            1
                                                                                                                                                                                Mon Tue Wed Thu     Fri   Sat   Sun Mon Tue Wed Thu          Fri   Sat   Sun
                                                                                                                                                                            0
                                                                                                                                                                             6/15 6/16 6/17 6/18 6/19 6/20 6/21 6/22 6/23 6/24 6/25 6/26 6/27 6/28 6/29
                                                                                                                                                                                                                Date/Time
     V/C ratio




                 1




                 0
                  0:00               6:00                        12:00                     18:00                 0:00
                                                             Time of Day
Closing message
• Let’s stop modeling what we can measure.
• Let’s continue to enhance controllers to help us
  manage our systems.
• Let’s close the “system performance
  measurement” loop.
References
• Day, C.M., R.J. Haseman, H. Premachandra, T.M. Brennan, J.S. Wasson, J.R.
  Sturdevant, and D.M. Bullock, “Visualization and Assessment of Arterial
  Progression Quality Using High Resolution Signal Event Data and
  Measured Travel Time,” Transportation Research Board Paper ID:10-
  0039, January 2010.
• Bullock, D.M., R.J. Haseman, J.S. Wasson, and R. Spitler, “Anonymous
  Bluetooth Probes for Airport Security Line Service Time Measurement:
  The Indianapolis Pilot Deployment,” Transportation Research Board Paper
  ID:10-1438, January 2010.
• Haseman, R.J., J.S. Wasson, and D.M.Bullock, “Real Time Measurement of
  Work Zone Travel Time Delay and Evaluation Metrics,” Transportation
  Research Board Paper ID:10-1442, January 2010.
• Day, C.M., J.R. Sturdevant, and D.M. Bullock, “Outcome Oriented
  Performance Measures for Signalized Arterial Capacity Management,”
  Transportation Research Board Paper ID:10-0008, January 2010.
• Smaglik E.J., A. Sharma, D.M. Bullock, J.R. Sturdevant, and G.
  Duncan, “Event-Based Data Collection for Generating Actuated Controller
  Performance Measures," Transportation Research
  Record, #2035, TRB, National Research Council, Washington, DC, pp.97-
  106, 2007.
OperationalPicture Book
         A Performance Measures and
            Outcome Based
             Approach
 Assessment for Arterial Management
        to Traffic Signal
         using High Resolution
 Controller Data and Bluetooth Probes
            Management
           Jay Wasson & Jim Sturdevant,
        Indiana Department of Transportation

  Chris Day, Ross Haseman, Tom Brennan, Alex Hainen,
               Steve Remias & Darcy Bullock
       Purdue University School of Civil Engineering
•SR 37 Free
400
                     1/14/2010 Clear PM Peak (Vehicle Arrival w/Reference to Upstream BOG)
                                               T&C to Pleasant
           350


           300


           250
Vehicles




           200


           150


           100


           50


            0
                 0   10   20   30   40   50   60   70   80    90 100 110 120 130 140 150 160 170 180 190 200 210 220 230

                                                             Travel Time (Seconds)
400
                     1/7/2010 Snow PM Peak (Vehicle Arrival w/Reference to Upstream BOG)
                                              T&C to Pleasant
           350


           300


           250
Vehicles




           200


           150


           100


           50


            0
                 0   10   20   30   40   50   60   70   80    90 100 110 120 130 140 150 160 170 180 190 200 210 220 230

                                                             Travel Time (Seconds)
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management
ATIS: A Picture Book Approach to Traffic Signal Management

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ATIS: A Picture Book Approach to Traffic Signal Management

  • 1. Operational Performance Measures and A PictureBased Outcome Book AssessmentApproach for Arterial Management using High Resolution to Traffic Data and Database Controller Data, Probe Signal Management QA/QC Procedures Darcy Bullock darcy@purdue.edu Purdue University School of Civil Engineering
  • 3.
  • 4.
  • 6.
  • 7. Advanced Transportation Information Systems (ATIS) Messages Opportunities to What gets measured gets done, Push the State of what gets measured and fed back the Possible gets done well, what gets rewarded gets repeated. – John E. Jones Enormous opportunities to fuse data from • traffic signal controllers and • probe data sources
  • 8. Circa 1995 Screen Scrapes (PPTs were so old they did not load) LSU vehicle (25k miles) I-10/12 Split Segment Coding R D S an t nna e FM s ub ca r re r i G P S an t nna e S a t llit s gna l e e i 1001 7 1005 1004 1002 1006 101 1003 1008 1010 1009 7 101 10 100 3 10 11 14 1018 RD S T ri b e m l 10 D if fe ren ta lco r re c ton i i 15 10 300 0 P a ce r l 12 400 10 16 Lap t p o co pu t r m e DG PS da t a
  • 9. Evolution LSU Early Controller CMU (Denardo Data (Brute Force Years) 1990 2000 2010 Brute force Performance GPS Data Saban joins Measures LSU
  • 10. October 2006 State of the practice
  • 11. “If one wants to be outstanding in there field, one must first spend some time standing in the field” Bill Kloose
  • 12. Contributor to this talk • INDOT (Infrastructure • Indiana LTAP Support and Agency – Neal Carboneau Perspective) – Jay Grossman (Elkhart – Jim Sturdevant County) – Jay Wasson • Andrew Nichols (Marshall – Ryan Gallagher University) – Greg Richards • Econolite (ASC 3 Data • Purdue University Logger ) – Chris Day – Gary Duncan – Tom Brennan – Eric Raamot – Ross Haseman – Lu Ta – Alex Hainen – Brian Griggs – Steve Remias – Darcy Bullock 12
  • 13. Emerging Shared Vision Active Traffic Signal 1. Develop Management infrastructure and procedures to systematically prioritize investing Agencies Universities Vendors engineering resources 2. Assess that impact We are in a period where we need to re- introduce theory and fundamentals so we change how agencies spec. & operate traffic signals and what vendors provide and
  • 14. True or False On Average, we have no capacity problems at any signalized intersection? 250 200 Counts per 15 minutes 150 100 50 0 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 Time of Day
  • 15. 15-Minute Counts (Phase “n”) 250 200 Counts per 15 minutes 150 100 50 0 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 Time of Day 15
  • 16. Challenge How can we use controller and probe data to quantify what we can see and assess if we can improve.
  • 17. Outline • Signal Management/ Challenges • Data Sources – Controller – Probe Vehicles • Fundamentals • Data ->Information to assess fundamentals • Results • Q&A..Dialog Don’t wait until the End
  • 18. INDOT Signal Network Question • Where (and when) are the opportunities to improve signal operations? INDOT: 2,600 signals in 300 systems Nationwide: 350,000 signals Globally: who knows? 18
  • 19. ~350,000 Traffic Signals…We need systematic procedures for identifying operational problems…and fixing them using controller and probe data.
  • 20. Chicago Typical Corridor (22 Intersections) 80 65 65 65 Lafayette 74,000 Indianapo Parameters/int 70 N Map Area Isolated Indianapolis, IN 65 (Free) Operation Coordinated Operation 1 65 2 3 US30 d) 5 ft antenna 4 5 6 8 10 12 65 18 2000 ft 20 22 14 16 500 m e) 7.5 ft antenna US30 d) 5 ft antenna N 4,000 FT 1,000 M 7 9 11 65 15 13 17 19 21 e) 7.5 ft antenn 2000 ft 500 m US30 d) 5 ft antenna
  • 21. ~74,000 Configurable Parameters/Int 192M Statewide! ~1.6M Parameters Default Database Default Database Query of Each Intersection 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Longitudinal Query of Intersection Controller Databases
  • 22. So how many do we really use? 3200 Isolated Coordinated Vendor Specific 3000 (Free) Operation Operation NTCIP 1202 2800 2600 2400 COUNT OF ALTERED PARAMETERS 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 INTERSECTION ID
  • 23. Traffic Signal Timing Process Opportunity Today’s Message I. II. III. IV. V. VI. Define Assembly Software Timing Design Deployment Assess Objectives, relevant data Modeling and Docu- Assess and to support mentation Prioritize timing and activities by docu- Time of Day mentation and location objectives
  • 24. Outline • Signal Management/ Challenges • Data Sources – Controller – Probe Vehicles • Fundamentals • Data ->Information to assess fundamentals • Results • Q&A..Dialog
  • 25. Historical data collection (~1,000:1) averages out all of the information Typical less then 500 average values/day sent to Traffic ~500,000 Management Centers Events/day (and those are rarely archived)
  • 26. Easter Weekend: Southbound Example 40 min travel time sample Observed at 18:10 ~MM 244 ~40 ~MM 220 minutes Observed at 18:50
  • 27. Easter Weekend Southbound Travel Time (~24 miles) 140 Friday Saturday Sunday Monday 120 SB Travel Time (minutes) Approximately 1 hour of delay Diversions on 100 State/Local Roads 80 60 Normal Travel Time ~ 22 minutes 40 20 0 4/10/09 0:00 4/11/09 0:00 4/12/09 0:00 4/13/09 0:00 4/14/09 0:00
  • 28. Sample SR 32 Arterial Data SR 32 Instrumented Arterial from SR 238 to SR 37
  • 29.
  • 30. Econolite ASC 3 Bluetooth Antenna with Indiana Data Logger Enabled SR 32 @ SR 238 Bluetooth Data Ethernet Switch Logger
  • 31. SR-37 Travel Times 10 Perhaps 9 Opportunity to 8 improve on Saturday 7 Travel Time (min) 6 5 4 3 2 1 Perhaps M T W Th F Sa Su M T W Th F Sa Su Opportunity to 0 6/15 6/16 6/17 6/18 6/19 6/20 6/21 6/22 6/23 6/24 6/25 6/26 6/27 6/28 6/29 improve on Saturday
  • 32. Outline • Signal Management/ Timing overview • Data Sources – Controller – Probe Vehicles • Fundamentals • Data ->Information to assess fundamentals • Results • Q&A..Dialog
  • 33. Highway Capacity Manual Delay Equation Oversaturation d d1 PF d2 d3 (Split Failures) 2 g ,a 1 P ,a 0.5C 1 PF ,a fPA Ca g ,a d1, ,a 1 g ,a C 1 min 1 X , ,a Ca 1 Capacity Utilization (Volume-to-Capacity Ratio) Quality of Progression (Percent on Green) 2
  • 34. Coordination: Split, Cycle, Offset 5L Cycle Really Hard 4L to get perfect for 22 Intersections Distance 3L 2L L 1 2 3 4 Time (cycles)
  • 35. Coordination: Split, Cycle, Offset 5L Phone calls 4L work pretty well Distance 3L 2L Split L 1 2 3 4 Time (cycles)
  • 36. Coordination: Split, Cycle, Offset 5L Tuning is 4L labor intensive Distance 3L 2L Offset L 1 2 3 4 Time (cycles)
  • 37. Coordination: Split, Cycle, Offset 74,000 parameters, 1000’s of opportunities to make mistakes 5L Cycle 4L Distance 3L 2L Offset Split L 1 2 3 4 Time (cycles)
  • 38. Operational Performance Measures and A PictureBased Outcome Book AssessmentApproach for Arterial Management using High Resolution to Traffic Data and Database Controller Data, Probe Signal Management QA/QC Procedures
  • 39. Outline • Signal Management/ Challenges • Data Sources – Controller – Probe Vehicles • Fundamentals • Data ->Information to assess fundamentals • Results • Q&A..Dialog
  • 40. Purdue Coordination Diagram Construction (PCD) Loop Detection Time in cycle 120 Cycle boundary 90 Red Green phase ends 70 Green Cycle begins window phase begins Cycle ends Green 50 Green time 0 0 sec 50 sec 90 sec 120 sec 12:00:00 12:02:00 time of day 12:00:00 12:01:10 12:02:00 70 sec 12:01:10
  • 41. a c383 c384 f c g b e d c385 c386 c387 c388 i c389 c390 h c391 c392 c393 c394 c395 c396 c397 Phase 3 Phase 4 Phase 1 Clearance Phase 2 Green 52 Phase 2 Red
  • 42. Timing Plan Pattern 1 24 Hour 3Overview 2 4 5 6 7 8 20-pt. moving average b2 a2 a1 b1 53
  • 43. NB @ Pleasant NB @ SR 238 Travel Times 10 9 8 7 Travel Time (min) 6 Better Progression 5 4 3 2 1 Perhaps M T W Th F Sa Su M T W Th F Sa Su Opportunity to 0 6/1 6/2 6/3 6/4 6/5 6/6 6/7 6/8 6/9 6/10 6/11 6/12 6/13 6/14 6/15 improve on Saturday
  • 44. Saturday Offset Adjustment SR 32 good Random arrivals Pleasant No platoons bad Town & Country good good bad Greenfield bad 55
  • 45. Three Poor Offsets NB @ 37/Pleasant SB @ 37/Greenfield NB @ 37/Greenfield 56
  • 46. Offset Adjustments on Middle Segment SR 32 good Random arrivals Pleasant No platoons bad Town & Country good good bad Greenfield bad 57
  • 47. Offset Adjustments on Middle Segment • Northbound at 37/Pleasant is bad. The platoon is captured in red. • However, any offset adjustments that we make will also impact Southbound progression at 37/Town and Country (intersection to south) by shifting arrivals. • We can mitigate any impacts at 32/37 (intersection to north) by adjusting its offset to keep it fixed relative to 37/Pleasant. NB @ 37/Pleasant SB @ 37/Town and Country POG = 40.1% POG = 80.2% 5069 arrivals on green (0600-2200) 58
  • 48. Add 10 seconds at 37/Pleasant • Green times will occur 10 seconds earlier at 37 & Pleasant – Equivalent to vehicles arriving 10 seconds later • Southbound vehicles will arrive 10 seconds earlier at 37 & Town and Country NB @ 37/Pleasant SB @ 37/Town and Country POG = 55.4% POG = 77.8% 5589 arrivals on green 59
  • 49. Add 20 seconds at 37/Pleasant • Green times will occur 20 seconds earlier at 37 & Pleasant – Equivalent to vehicles arriving 20 seconds later • Southbound vehicles will arrive 20 seconds earlier at 37 & Town and Country NB @ 37/Pleasant SB @ 37/Town and Country POG = 67.4% POG = 68.8% 5688 arrivals on green 60
  • 50. Add 30 seconds at 37/Pleasant • Green times will occur 30 seconds earlier at 37 & Pleasant – Equivalent to vehicles arriving 30 seconds later • Southbound vehicles will arrive 30 seconds earlier at 37 & Town and Country NB @ 37/Pleasant SB @ 37/Town and Country POG = 73.4% POG = 57.5% 5446 arrivals on green 61
  • 51. Comparison with original (actual “before” case) SR 32 good Pleasant bad Town & Country good good bad Greenfield bad 62
  • 52. Predicted Vehicle Distributions with Offset Adjustments SR 32 Unchanged Pleasant Better Town & Country Still OK Still OK Better Greenfield Better 63
  • 53. Outline • Signal Management/ Timing overview • Data Sources – Controller – Probe Vehicles • Fundamentals • Data ->Information to assess fundamentals • Results • Q&A..Dialog
  • 54. So..did it have an impact.
  • 55. SB, SR 37 / SR 32 NB, SR 37 / SR 32 Before d 1001 0600 1400 2200 0600 1400 2200 SB, SR 37 / Pleasant NB, SR 37 / Pleasant 1002 a 0600 1400 2200 0600 1400 2200 SB, SR 37 / Town & Country NB, SR 37 / Town & Country 1003 0600 1400 2200 0600 1400 2200 SB, SR 37 / Greenfield NB, SR 37 / Greenfield c 1004 b 0600 1400 2200 0600 1400 2200
  • 56. SB, SR 37 / SR 32 NB, SR 37 / SR 32 e After d 1001 0600 1400 2200 0600 1400 2200 SB, SR 37 / Pleasant NB, SR 37 / Pleasant a 1002 z z 0600 1400 2200 0600 1400 2200 SB, SR 37 / Town & Country NB, SR 37 / Town & Country 1003 f 0600 1400 2200 0600 1400 2200 SB, SR 37 / Greenfield NB, SR 37 / Greenfield b c 1004 0600 1400 2200 0600 1400 2200
  • 57. SB, SR 37 / SR 32 NB, SR 37 / SR 32 e Predicted d 1001 0600 1400 2200 0600 1400 2200 SB, SR 37 / Pleasant NB, SR 37 / Pleasant a 1002 0600 1400 2200 0600 1400 2200 SB, SR 37 / Town & Country NB, SR 37 / Town & Country 1003 f 0600 1400 2200 0600 1400 2200 SB, SR 37 / Greenfield NB, SR 37 / Greenfield b c 1004 0600 1400 2200 0600 1400 2200
  • 58. Before 9 (Sample size=4797) 8 7 Long Saturday travel times compared to rest Measured Travel Time (min) of week 6 5 4 3 2 1 Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun 0 6/15 6/16 6/17 6/18 6/19 6/20 6/21 6/22 6/23 6/24 6/25 6/26 6/27 6/28 6/29 Date/Time
  • 59. After 9 (Sample size=5401) 8 7 Saturday travel times Measured Travel Time (min) comparable to rest of week 6 5 4 3 2 1 Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun 0 7/13 7/14 7/15 7/16 7/17 7/18 7/19 7/20 7/21 7/22 7/23 7/24 7/25 7/26 7/27 Date/Time
  • 60. Lets Evaluate the Impact Statistically and Financially I. II. III. IV. V. VI. Define Assembly relevant Software Modeling Timing Design and Deployment Assess Objectives, Assess data to support Docu- mentation and Prioritize timing and docu- activities by Time mentation of Day and location objectives
  • 61. NB: June 6, 2009 0900-1200 Travel Time Histograms 60 100% 90% 50 80% Frequency 70% 40 Cumulative % 60% Frequency 30 50% 40% 20 30% 20% 10 10% 0 0% 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 More Travel Time Bin (Minutes)
  • 62. NB: July 18, 2009 0900-1200 Travel Time Histograms 60 100% 90% 50 80% Frequency 70% 40 Cumulative % 60% Frequency 30 50% 40% 20 30% 20% 10 10% 0 0% 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 More Travel Time Bin (Minutes)
  • 63. Before (6/20/09) After (7/25/09) ~1 min Travel Time Reduction
  • 64. Business Case: SR 37 Timing Improvements (Largest Cost Benefit/Reduction/Avoidance) USER SAVINGS • Travel time tests for SR37 Corridor 1 have improved Northbound Travel Time by ~ 1 Minute. 0.75 • ~8,500 Cars per Day Are Effected by Cumulative Probability this benefit (NB). 0.5 • ~0.17 Cents per minute ($10/hour) saved for each driver in fuel costs and time value. 0.25 • ~1.0 Minutes are assumed saved on average for the intersection over 1- 0 Year with improvements. 0 1 2 3 4 5 6 7 8 9 Travel Time (min) • User benefit = 0600 -2200 (8,500 veh) (8,500 Veh/Day * $0.17/min * 1- min/Veh * 2*52 Days/Year )= $150,000/year for a 1.6 mile stretch of roadway is realized. 76
  • 65. Southbound Northbound Baseline Optimized (Obj. III) Baseline Optimized (Obj. III) 1.0 1.0 1.0 1.0 1/SB 1/NB 0.5 0.5 0.5 0.5 0.0 0.0 0.0 0.0 Int. 1 1.0 1.0 1.0 1.0 2/SB 2/NB 0.5 0.5 Int. 2 0.5 0.5 0.0 0.0 0.0 0.0 1.0 1.0 Int. 3 1.0 1.0 3/SB 3/NB 0.5 0.5 0.5 0.5 0.0 0.0 Int. 4 0.0 0.0 1.0 1.0 1.0 1.0 4/SB 4/NB 0.5 0.5 0.5 0.5 0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0 5/SB 5/NB 0.5 0.5 Int. 5 0.5 0.5 0.0 0.0 0.0 0.0 1.0 1.0 Int. 6 1.0 1.0 6/SB 6/NB 0.5 0.5 0.5 0.5 0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0 7/SB Int. 7 7/NB 0.5 0.5 0.5 0.5 Int. 8 0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0 8/SB 8/NB 0.5 0.5 0.5 0.5 0.0 0.0 0.0 0.0 0 29 57 86 114 0 29 57 86 114 0 29 57 86 114 0 29 57 86 114 Time in Cycle (s) Time in Cycle (s) Time in Cycle (s) Time in Cycle (s)
  • 66. Travel Time between 4 intersections 100% 100% IV IV I III 75% 75% II II I 50% 50% III Base Base 25% 25% 0% 0% 1 2 3 4 5 6 7 1 2 3 4 5 6 7 (e) Southbound, Case B to Case C. (f) Northbound, Case C to Case B. Cumulative frequency diagrams of probe vehicle travel times for alternative objective functions, Saturday, 1500-1800.
  • 67. Economic Impact (52 Saturdays) Daily Annual CO2 CO2 Total Time Emission Emission Saved Reduction CO2 User Multi- Reduction CO2 User Objective (veh-min) (tons) Savings Benefits plier (tons) Savings Benefits (a) System 1, Northern Section I Min Delay 5032 0.71 $16 $1,697 52 37 $810 $88,233 II Min Delay and Stops 3813 0.54 $12 $1,286 52 28 $614 $66,864 III Max Ng 1760 0.25 $5 $593 52 13 $283 $30,855 IV Alt. Max Ng 7883 1.11 $24 $2,658 52 58 $1,268 $138,229 (b) System 2, Southern Section I Min Delay 24386 3.43 $75 $8,223 52 178 $3,924 $427,614 II Min Delay and Stops 25327 3.56 $78 $8,541 52 185 $4,075 $444,111 III Max Ng 25147 3.54 $78 $8,480 52 184 $4,046 $440,962 IV Alt. Max Ng 26338 3.70 $81 $8,882 52 193 $4,238 $461,845 (c) System 1 and System 2, Arterial I Min Delay 29418 4.14 $91 $9,920 52 215 $4,733 $515,847 II Min Delay and Stops 29140 4.10 $90 $9,826 52 213 $4,689 $510,976 III Max Ng 26907 3.78 $83 $9,073 52 197 $4,329 $471,817 IV Alt. Max Ng 34221 4.81 $106 $11,540 52 250 $5,506 $600,073 Controller PM + Probe Data
  • 68. Emerging Shared Vision Active Traffic Signal 1. Develop Management infrastructure and procedures to systematically prioritize investing Agencies Universities Vendors engineering resources 2. Assess that impact We are in a period where we need to re- introduce theory and fundamentals so we change how agencies spec. & operate traffic signals and what vendors provide and
  • 69. 1 $150,000 0.75 Cumulative Probability 0.5 0.25 0 0 1 2 3 4 5 6 7 8 9 Travel Time (min) 0600 -2200 (8,500 veh) What gets measured gets done, what gets measured and fed back gets done well, what gets rewarded gets repeated. – John E. Jones Darcy Bullock darcy@purdue.edu Purdue University School of Civil Engineering
  • 70.
  • 72. SR37 Fishers/Noblesville- (9) Very good 2 way progression
  • 73. Coordination: Split, Cycle, Offset 5L Cycle Really Hard 4L to get perfect for 22 Intersections Distance 3L 2L L 1 2 3 4 Time (cycles)
  • 74. US 31 @ 126th (8 in system) Plan /cycle change discrepancy from north
  • 76. Thursday (12/8) Should we still be running coord @ 9pm?
  • 77. Opportunities Active Traffic Signal 1. Hi Resolution Management Controller Data Performance Measure Picture Book Universities Agencies Vendors Manual 2. Integrated (but independent) Probe Data We are in a period where we need to re- introduce theory and fundamentals so we Assessment change how agencies spec. & operate traffic signals and what vendors provide and
  • 78. Scales well…4 more intersections added to corridor in Summer 2010
  • 79. Alternative Objective Functions 8 14 Performance Index (veh-h/h) 7 12 6 Delay (veh-h/h) 10 5 8 +44 4 +56 6 3 4 2 1 2 0 0 0 15 30 45 60 75 90 0 15 30 45 60 75 90 Offset Adjustment Offset Adjustment (a) Objective I: Estimated delay. (b) Objective II: Delay and stops. 600 400 350 +40 500 Alt. Number on Green Number on Green 300 400 +44 250 300 200 150 200 100 100 50 0 0 0 15 30 45 60 75 90 0 15 30 45 60 75 90 Offset Adjustment Offset Adjustment (c) Objective III: Number of arrivals on (d) Objective IV: Alternative number of green. arrivals on green. 1
  • 80. Southbound Northbound Baseline Optimized (Obj. III) Baseline Optimized (Obj. III) 1.0 1.0 1.0 1.0 1/SB 1/NB 0.5 0.5 0.5 0.5 0.0 0.0 0.0 0.0 Int. 1 1.0 1.0 1.0 1.0 2/SB 2/NB 0.5 0.5 Int. 2 0.5 0.5 0.0 0.0 0.0 0.0 1.0 1.0 Int. 3 1.0 1.0 3/SB 3/NB 0.5 0.5 0.5 0.5 0.0 0.0 Int. 4 0.0 0.0 1.0 1.0 1.0 1.0 4/SB 4/NB 0.5 0.5 0.5 0.5 0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0 5/SB 5/NB 0.5 0.5 Int. 5 0.5 0.5 0.0 0.0 0.0 0.0 1.0 1.0 Int. 6 1.0 1.0 6/SB 6/NB 0.5 0.5 0.5 0.5 0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0 7/SB Int. 7 7/NB 0.5 0.5 0.5 0.5 Int. 8 0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0 8/SB 8/NB 0.5 0.5 0.5 0.5 0.0 0.0 0.0 0.0 0 29 57 86 114 0 29 57 86 114 0 29 57 86 114 0 29 57 86 114 Time in Cycle (s) Time in Cycle (s) Time in Cycle (s) Time in Cycle (s)
  • 81. Travel Time between 4 intersections 100% 100% IV IV I III 75% 75% II II I 50% 50% III Base Base 25% 25% 0% 0% 1 2 3 4 5 6 7 1 2 3 4 5 6 7 (e) Southbound, Case B to Case C. (f) Northbound, Case C to Case B. Cumulative frequency diagrams of probe vehicle travel times for alternative objective functions, Saturday, 1500-1800.
  • 82. Economic Impact Daily Annual CO2 CO2 Total Time Emission Emission Saved Reduction CO2 User Multi- Reduction CO2 User Objective (veh-min) (tons) Savings Benefits plier (tons) Savings Benefits (a) System 1, Northern Section I Min Delay 5032 0.71 $16 $1,697 52 37 $810 $88,233 II Min Delay and Stops 3813 0.54 $12 $1,286 52 28 $614 $66,864 III Max Ng 1760 0.25 $5 $593 52 13 $283 $30,855 IV Alt. Max Ng 7883 1.11 $24 $2,658 52 58 $1,268 $138,229 (b) System 2, Southern Section I Min Delay 24386 3.43 $75 $8,223 52 178 $3,924 $427,614 II Min Delay and Stops 25327 3.56 $78 $8,541 52 185 $4,075 $444,111 III Max Ng 25147 3.54 $78 $8,480 52 184 $4,046 $440,962 IV Alt. Max Ng 26338 3.70 $81 $8,882 52 193 $4,238 $461,845 (c) System 1 and System 2, Arterial I Min Delay 29418 4.14 $91 $9,920 52 215 $4,733 $515,847 II Min Delay and Stops 29140 4.10 $90 $9,826 52 213 $4,689 $510,976 III Max Ng 26907 3.78 $83 $9,073 52 197 $4,329 $471,817 IV Alt. Max Ng 34221 4.81 $106 $11,540 52 250 $5,506 $600,073
  • 83. Assessing Deployments is Essential and Possible….we just have to do it I. II. III. IV. V. VI. Define Assembly relevant Software Modeling Timing Design and Deployment Assess Objectives, Assess data to support Docu- mentation and Prioritize timing and docu- activities by Time mentation of Day and location objectives 9 8 7 Long Saturday travel times compared to rest Measured Travel Time (min) of week 6 5 4 V/C ratio, Northbound approach Phase 2, Noblesville, 07/25/2006 3 Equivalent Hourly Volume 2 2 Free AM Off- Mid- Off- PM Off- Free Peak Peak day Peak Peak peak 1 Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun 0 6/15 6/16 6/17 6/18 6/19 6/20 6/21 6/22 6/23 6/24 6/25 6/26 6/27 6/28 6/29 Date/Time V/C ratio 1 0 0:00 6:00 12:00 18:00 0:00 Time of Day
  • 84. Closing message • Let’s stop modeling what we can measure. • Let’s continue to enhance controllers to help us manage our systems. • Let’s close the “system performance measurement” loop.
  • 85. References • Day, C.M., R.J. Haseman, H. Premachandra, T.M. Brennan, J.S. Wasson, J.R. Sturdevant, and D.M. Bullock, “Visualization and Assessment of Arterial Progression Quality Using High Resolution Signal Event Data and Measured Travel Time,” Transportation Research Board Paper ID:10- 0039, January 2010. • Bullock, D.M., R.J. Haseman, J.S. Wasson, and R. Spitler, “Anonymous Bluetooth Probes for Airport Security Line Service Time Measurement: The Indianapolis Pilot Deployment,” Transportation Research Board Paper ID:10-1438, January 2010. • Haseman, R.J., J.S. Wasson, and D.M.Bullock, “Real Time Measurement of Work Zone Travel Time Delay and Evaluation Metrics,” Transportation Research Board Paper ID:10-1442, January 2010. • Day, C.M., J.R. Sturdevant, and D.M. Bullock, “Outcome Oriented Performance Measures for Signalized Arterial Capacity Management,” Transportation Research Board Paper ID:10-0008, January 2010. • Smaglik E.J., A. Sharma, D.M. Bullock, J.R. Sturdevant, and G. Duncan, “Event-Based Data Collection for Generating Actuated Controller Performance Measures," Transportation Research Record, #2035, TRB, National Research Council, Washington, DC, pp.97- 106, 2007.
  • 86. OperationalPicture Book A Performance Measures and Outcome Based Approach Assessment for Arterial Management to Traffic Signal using High Resolution Controller Data and Bluetooth Probes Management Jay Wasson & Jim Sturdevant, Indiana Department of Transportation Chris Day, Ross Haseman, Tom Brennan, Alex Hainen, Steve Remias & Darcy Bullock Purdue University School of Civil Engineering
  • 87.
  • 89. 400 1/14/2010 Clear PM Peak (Vehicle Arrival w/Reference to Upstream BOG) T&C to Pleasant 350 300 250 Vehicles 200 150 100 50 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 Travel Time (Seconds)
  • 90. 400 1/7/2010 Snow PM Peak (Vehicle Arrival w/Reference to Upstream BOG) T&C to Pleasant 350 300 250 Vehicles 200 150 100 50 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 Travel Time (Seconds)

Editor's Notes

  1. Developing weekend plans is a challenge for most agencies because of the need to collect data on weekends.In this case, on SR 37 the weekend plan has not been updated for quite some time… so we felt it would be a good idea to take a look and see if there were any opportunities for improving it.Here are the progression diagrams… (talk through good/bad)Good progression at x, y, z shown by the distribution of vehicles coinciding with the green band.-Poor progression at a,b,c illustrated by the distribution of vehicles coinciding with the red.We have random arrivals at the northern entry point into the system… we also see what appear to be random arrivals occurring at 37 and Pleasant.
  2. Here’s a closer look at the threecoord phases with poor quality of progression. Each of these shows a clear example of a case where we could improve the offsets. The vehicles appear to arrive in regular platoons, but those platoons are arriving during the red phase.
  3. To illustrate this concept in detail, we will focus on the 2nd and 3rd intersections on SR 37.
  4. Here’s an example where the approach on one end of the intersection has very good progression (POG = 80%), while the other on the opposite has rather poor progression (40%). Although we can change the offset at either intersection, there is only one relative offset between the two intersections that strongly influences the progression quality at both intersections. This is a classic example of a case where a tradeoff has to be made between one direction and the other…We’ll use progression diagrams to estimate what will happen as we change the offset… keeping track of total vehicle arrivals on green as the quantity we are trying to maximize.
  5. Now that we have found some optimal offsets, we can use progression diagrams to estimate what the impact will be.First, we’ll put up the current weekend offsets and the actual time when vehicles are arriving during cycle for each intersection.
  6. If we adjust the arrival times of vehicles according to the proposed offsets, this is the estimated impact on the system.(flip back and forth)As we can see here, we expect these adjustments to cause the coord platoons that are currently arriving in red to be shifted into green.The other offsets that were formerly good have not been negatively affected. In this case, we predict that southbound at 37/Town and Country will suffer a little, but it should be offset by substantial improvements at the other approaches.