2017 VDOT Repaving and Restriping Reston: Bicycle, Pedestrian and Traffic Safety Improvements

County of Fairfax, Virginia
2017 VDOT Repaving and Restriping -
Reston
MARCH 16, 2016
ADAM LIND – PROJECT MANAGER
DEPARTMENT OF TRANSPORTATION
Bicycle, Pedestrian, and
Traffic Safety Improvements

Meeting Agenda
•Open House
•Presentation
•Background Information
•Recap of November 14th
Meeting and Comments
•Proposal Details
•Q & A Session
•Next Steps
2

Overview
•Why are we here?
•What are we asking from the
community?
•What projects are being
proposed?
•Where are we in the process?
•What are the next steps?
3

VDOT Annual Repaving
•VDOT Summer repaving includes several roads in the Hunter Mill
District. Opportunity to review pavement markings and street
design. Proposals are limited to restriping the existing pavement.
•Opportunity to slow speeding traffic, provide transportation
options, and improve traffic, bicycle, and pedestrian safety
•No additional cost for the County
•Want to hear from the community about issues/concerns
• Some concerns may be addressed through restriping
For information on all paving in Hunter Mill District visit:
www.virginiaroads.org
4

•Twin Branches Road
◦South Lakes Dr to Lawyers Rd = 1 mi
•Colts Neck Rd
◦Reston Parkway to Sunrise Valley Dr = 1.75 mi
•North Shore Drive
◦Ring Road to Park Glen Ct = 3.5 mi
5
November 14th
Recap

November 14th
Recap
•Multiple stations for people to give feedback
• Station 1-Where you live, where you want to be able to
walk/bike, issues, concerns, ideas
• Station 2-What are your priorities? Walking, Bicycling,
Parking, Driving
• Station 3-Design your own streets
• Station 4-Where do you want to see Capital Bikeshare
stations?
6

November 14th
Recap
• Station 1-Where you live, where you want to be able to
walk/bike, issues, concerns, ideas
7

November 14th
Recap
• Station 2-What are your priorities? Walking, Bicycling, Parking,
Driving
8

November 14th
Recap
• What are your priorities? Walking, Bicycling, Parking,
Driving
9
North Shore Dr
First
priority
Second
priority
Third
priority
Fourth
priority Total
Bicycling 11 4 0 0 15
Walking 3 5 1 0 9
Parking 7 0 1 0 8
Driving 5 1 1 1 8

November 14th
Recap
Driving
10
Colts Neck Rd
First
priority
Second
priority
Third
priority
Fourth
priority Total
Walking 2 5 3 0 10
Parking 2 3 1 3 9
Driving 3 0 3 0 6

November 14th
Recap
Driving
11
Twin Branches Rd
First
priority
Second
priority
Third
priority
Fourth
priority Total
Walking 3 9 2 0 14
Parking 4 2 2 3 11
Driving 3 2 5 0 10

November 14th
Recap
• Station 3-Design your own streets
12

13
Bicycle Master Plan
Adopted by the Board of Supervisors
October 28, 2014
Bike Lanes
Bike Lanes

14
Bike Lanes
Bike Lanes
Climbing Lane
(Sharrow +Bike Lane)

Bicycle Facility Types
•Sharrow
•Climbing Lane
•Bike Lane
More dedicated space and comfort
Less dedicated space and comfort

Sharrow-Shared Lane Markings (SLMs), or “sharrows,” are road
markings used to indicate a shared lane environment for bicycles and
automobiles. Among other benefits shared lane markings reinforce the
legitimacy of bicycle traffic on the street, recommend proper bicyclist
positioning, and may be configured to offer directional and wayfinding
guidance

Bike Lane-Bike lanes designate an exclusive space for bicyclists through
the use of pavement markings and signage. The bike lane is located
adjacent to motor vehicle travel lanes and flows in the same direction
as motor vehicle traffic.

Climbing Lane-A climbing lane
incorporates two different facilities on
the same roadway segment; a bike lane
is provided in the uphill direction to
accommodate slower moving bicyclists
and a sharrow is provided in the
downhill direction, where bicyclists can
typically travel at a speed closer to
motorists.

Lane Diets
19
A Lane Diet is generally described as narrowing travel
lanes from a roadway and utilizing the space for other
uses and travel modes.
Does not involve reducing the number of travel lanes
Benefits
◦Providing transportation alternatives and options
◦Increasing safety for non-motorized users
◦Reduce speeding

Lane Width and Vehicle
Speeds
20

Road Diet
• Removing travel lanes from a
roadway and reallocating the space
for other uses
• Rule of thumb: Roads with less
than 20,000 vehicles per day don’t
need four travel lanes
• Have now implemented road diets
in several places in Fairfax County
◦Lawyers Rd, Soapstone Dr, Kingstowne Village
Parkway, Westbranch Dr, Greensboro Dr, Park
Run Dr, Beacon Hill Road, Ravensworth Rd
21

Road Diet Advantages
•Improved safety and mobility for people driving,
walking, and bicycling
◦Drivers: Reduction in top end speeding, 15mph>, provides dedicated turn
lane at intersection=reduction in rear end crashes=safer streets
◦Pedestrians: Shorter distances to cross the street, less speeding, more
buffer space from moving vehicles=safer streets
◦Bicyclists: Provides dedicated space to ride, not blocking flow of vehicle
traffic, reduced conflicts and potential for crashes=safer streets
• Reduction in fastest speeds
• 20% to 50% crash reduction

In existing conditions, if a driver moves slightly over the double yellow line there
is a risk for a head-on crash. In the proposed design, center turn lanes provide a
buffer from oncoming traffic.
Existing Proposed

Existing Proposed
In existing conditions, if a driver swerves slightly to the right, there is a risk for a
collision with the curb. In the proposed design, bikes lanes provide buffer from
curb, although the bike lane shouldn’t be regularly used by drivers.

Existing Proposed
In existing conditions, if a driver pulls over with disabled vehicle, there is a risk
of being in a rear-end collision. In the proposed design, bike lane can provide
safe area during emergency conditions, and help to avoid a rear-end collision.

Existing Proposed
In existing conditions, if a driver is waiting for traffic to clear to make a left turn,
there is a risk of a rear-end collision. In the proposed design, left turn lanes
provide dedicated space to make turn, out of the way of through traffic.

Existing Proposed
In existing conditions, if two drivers are making left turns, they block each others
sight distance and view of oncoming traffic. In the proposed design, turn lanes
provide better sight lines and view of oncoming traffic.

Existing
In existing conditions, the sight lines for drivers exiting side streets can make it
difficult to see oncoming traffic. In the proposed design, the through lane is away
from the curb, and a driver has a better view of oncoming vehicles.

Project Proposals
29
•Colts Neck Road
• Lane Diet and Road Diet
•Twin Branches Road
• Lane Diet
• Create dedicated left turn and right turn lanes at Lawyers Road
•North Shore Drive
• Lane Diet and Road Diet
• Create left turn lane at Temporary Road

Colts Neck Rd - Existing
30
•Reston Parkway to Sunrise Valley Dr
•Fall 2016 Traffic Count: 9,300 vehicles per day
•Speed Limit: 35 MPH
•Existing Conditions:
• Reston Parkway to Glade Drive: 1 travel lane each direction, some
parking
• Glade Drive to Sunrise Valley Drive: 2 travel lanes in each direction,
no parking

Colts Neck Rd –
Speed Data
31
•North of Colts Neck Ct
•South of Greywing Square

•9000 vehicles per day (2016 counts)
Colts Neck Rd (Colts Neck Ct)
Speed Data
32
Southbound Direction
Speed Limit: 35 mph
85th
Percentile: 34 mph
69% Traffic: < 30 mph
16% Traffic: 31-35 mph
1.5% Traffic: 41-45 mph
Northbound Direction
Speed Limit: 35 mph
85th
Percentile: 35 mph
63% Traffic: < 30 mph

Colts Neck Rd (Greywing Square)
Speed Data
33
Speed Limit: 35 mph
85th
Percentile: 42 mph
4% Traffic (160): 46-50 mph
Speed Limit: 35 mph
85th
Percentile: 39 mph
2% Traffic (88): 46-50 mph
(number of cars)

Colts Neck Rd -
Proposed
34
•Reston Parkway to Glade Drive
• Narrow each travel lane to 11’
• 5’ bike lane in each direction
• Parking remains everywhere
it exists today
•Glade Dr to Colts Neck Ct
• 1 travel lane, 1 bike lane in each direction,
and a center turn lane
• Evaluate new crosswalks
•Colts Neck Ct to Sunrise Valley Dr
• 1 SB lane, 2 NB travel lanes, 1 bike lane in
each direction

Colts Neck Rd -
Proposed
35
•Glade Dr to Steeplechase Dr
• Narrow Travel Lanes and add bike lanes
Existing Proposed

Colts Neck Rd -
Proposed
36
•Steeplechase Dr to Glade Dr
• Narrow Travel Lanes, keep parking, add bike lanes + sharrows
Existing Proposed

Colts Neck Rd -
Proposed
37
•Reston Parkway to Glade Dr
• 1 travel lane, 1 bike lane in each direction,
and a center turn lane
• Evaluate new crosswalks
•Road Diet increases crosswalk
opportunities by:
• Improving sight distance
• Shortening crossing distance
• Reducing # of travel lanes to cross
• Providing refuge space Ann Arbor, Michigan

Road Diet Impacts
• Intersections evaluated on average delay or Level of
Service (LOS)
• Intersections grade A-F, based off LOS
Level of
Service
Average
Delay
A <10 sec
B >10-20 sec
C >20-35 sec
D >35-55 sec
E >55-80 sec
F >80 sec

Road Diet Impacts
Existing Intersection Approaches Proposed Intersection Approaches
Through +
Turn

Road Diet Impacts -
Northbound
AM LOS
Existing
AM LOS
Road Diet
PM LOS
Existing
PM LOS
Road Diet
Glade Dr C: 36.5 C: 36.5 C: 27.9 C: 27.9
South
Lakes Dr
C: 21.6 C: 19.6 C: 15.5 C: 15.1
Sunrise
Valley Dr
E: 70 E: 70 F: 68.5 F: 68.5

Lawyers Rd Road Diet
Results
•Average speeds dropped by 1 mph
•Vehicles over 50 mph declined from 13% to 1% of traffic
•No change in traffic volume

0
5
10
15
20
25
Year 5 Year 4 Year 3 Year 2 Year 1 Year 1 Year 2 Year 3 Year 4 Year 5
Crashesperyear
Property Damage
Injury
Crashes in the Road Diet Section of Lawyers Rd.
B E F O R E A F T E R
Average 16 total crashes per year
Average 6 injury crashes per year
5 crashes per year
67%
A F T E R

Lawyers Road Survey• 851 responses, non-scientific, one year after implementation
• Does the road feel safer?
• Do you cycle more often on Lawyers?
• Do your auto trips take more time?
• Have auto speeds dropped?
• Did the project improve Lawyers?
Yes: 69%
Yes: 47%
No: 69%
Yes: 59%
Yes: 74%

2015 Road Diet Greensboro Drive
44

2015 Road Diet Greensboro Drive
45

Twin Branches Rd - Existing
46
•South Lakes Dr to Lawyers Rd:
•Fall 2016 Traffic Count: 10,000 vehicles per day Speed Limit: 35 MPH
•Existing Conditions: 1 travel lane in each direction, parking allowed

Twin Branches Rd – Speed Data
47

Twin Branches Rd – Speed Data
48
Speed Limit: 35 mph
85th
Percentile: 44 mph
9% Traffic (450): 46-50 mph
Speed Limit: 35 mph
85th
Percentile: 41 mph
2% Traffic (115): 46-50 mph
(number of cars)

Twin Branches Rd - Proposed
49
•1 travel lane in each direction, 1 bike lane
each direction
•Parking allowed on one side of the
roadway in sections
•Creation of dedicated left turn lane and
right turn lane approaching Lawyers Rd
•No change to vehicle lane configuration
approaching South Lakes Dr

Twin Branches Rd - Proposed
50
Existing Proposed
Parking Allowed Both Sides Parking only allowed on one side
Parking lane includes gutter pan

2015 Lane Diet Project-Annandale
Road
•Pre-Project Conditions
•Two travel lanes 16’+ wide
•Two parking lanes 8’ wide
•Post-Project Conditions
•Two travel lanes 11’ wide
•Two bike lanes 5’ wide
•Two parking lanes 8’ wide
51

Road
52

Road
53

After – Annandale Rd
54
Post Lane Diet + Bike Lanes
•Speed/Traffic counts at two locations in Fall 2016
•Highest average speed was 35 mph
•No 85% percentile speed over 39 mph

North Shore Dr- Existing
55
•Three major segments:
• 1) Ring Road to Wiehle Avenue (North): 36’ curb to curb
• 2) Wiehle Avenue (North) to Wiehle Avenue (South): 44’ curb to curb
• 3) Wiehle Avenue (South) to End of the street: 48’ curb to curb near Tall Oaks then
narrows

North Shore Dr – Speed Data
56
Count Location (Count Location (65006500 vehicles per day)vehicles per day)
Count Location (Count Location (45004500 vehicles per day)vehicles per day)
39003900 vehicles per dayvehicles per day

North Shore Dr (N of Temporary Rd)
Speed Data
57
Speed Limit: 25 mph
85th
Percentile: 31 mph
2% Traffic (70): 36-40 mph
Speed Limit: 25 mph
85th
Percentile: 32 mph
4% Traffic (121): 36-40 mph
(number of cars)

North Shore Dr (S of Temporary Rd)
Speed Data
58
Speed Limit: 30 mph
85th
Percentile: 34 mph
.6% Traffic (14): 41-45 mph
Speed Limit: 30 mph
85th
Percentile: 34 mph
.5% Traffic (11): 41-45 mph
(number of cars)

59
North
Shore Dr-
Proposed
1
2 3

North Shore – Proposed
Wiehle Ave (N) to Ivy Sq Ct
60
Existing Proposed
Parking lanes include gutter panParking Allowed Both Sides

Ivy Sq Ct to Wiehle Ave (S) Option 1
61
Existing Proposed
Parking only allowed on one side
Parking lane includes gutter pan
Parking Allowed Both Sides

Ivy Sq Ct to Wiehle Ave (S) Option 2
62
Existing Proposed
Parking Allowed Both Sides Parking lanes include gutter pan

Wiehle Ave (S) to Park Crest Cir
63
Existing Proposed
Through +
Turn

Big Picture
64
•Several Bicycle and Pedestrian Capital Projects
underway
•Major Projects along Sunrise Valley Drive and South
Lakes Drive
•Planned expansion of Capital
Bikeshare to neighborhoods south
of the Dulles Toll Road
• Need bike infrastructure to support

Big Picture
65
“Safety in numbers: more walkers and
bicyclists, safer walking and bicycling”
Peter Jacobsen, 2000
•Research in the US
and internationally
shows that when
more people
walk/bike the safer it
becomes

Big Picture
66
North of 267 Improvements South of 267 Improvements

Next Steps
•Comment period open for three weeks
• March 31, 2017
•FCDOT and VDOT will review input and update
designs
•Finalize design plans spring 2017 and repaving occurs
in summer/fall 2017
67

How to Comment
•Fill out comment sheets and submit tonight
•Mail comment sheets in over next three weeks
•E-mail comments to
DOTBicyclePrograms@fairfaxcounty.gov
Thank You for Participating
68

2017 VDOT Repaving and Restriping Reston: Bicycle, Pedestrian and Traffic Safety Improvements

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