Balls Hill Road and Old Dominion Drive Roadway Spot Improvement Intersection Alternative Study Public Information Meeting
1. County of Fairfax, Virginia
Department of Transportation
Balls Hill Road & Old Dominion Drive
Roadway Spot Improvement
Intersection Alternative Study
Public Information Meeting
Cooper Middle School
November 28, 2018
7:45 P.M.
Project Manager – Gibran Abifadel
2. County of Fairfax, Virginia
Department of Transportation
2
1. Project Location and Purpose
2. Project Background
3. Existing Conditions
4. Level of Service
5. Developer Projects
6. Intersection Improvement Alternatives (Alts. A-C)
7. Preferred Alternative (Alt A.1)
8. June 28, 2018 – Public Meeting Update
9. Project Schedule and Funding
10. Questions and Answers
Agenda
3. County of Fairfax, Virginia
Department of Transportation
3
Project Location
4. County of Fairfax, Virginia
Department of Transportation
4
• Improve traffic flow through the intersection by improving
geometry, signal operations, accessibility, and safety.
Project Purpose
5. County of Fairfax, Virginia
Project Background
• Partial funding for alternative analysis was included in the
Transportation Priorities Plan approved by the Board in 2014
• Study started March 2016
• Conceptual design and analysis of four alternatives
Department of Transportation
5
6. County of Fairfax, Virginia
Department of Transportation
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1. Weekday AM Peak Hour – Example of
WB of Old Dominion Drive Queueing
2. Old Dominion Drive looking northwest
3. Balls Hill Road looking north
1
2
3
Existing Conditions
7. County of Fairfax, Virginia
• Poor intersection operations
• Back-ups in the A.M. & P.M. peak periods
• Poor sight distance at all legs of the intersection
• Left turns act as U-turns from Old Dominion Drive onto
Balls Hill Road
• Right turns act as U-turns from Balls Hill Road onto
Old Dominion Drive
Department of Transportation
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Existing Conditions
8. County of Fairfax, Virginia
Department of Transportation
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Level of Service
Control Delay (seconds per vehicle)
Signalized Intersection Unsignalized Intersection
A ≤ 10 ≤ 10
B >10 and ≤20 >10 and ≤15
C >20 and ≤35 >15 and ≤25
D >35 and ≤55 >25 and ≤35
E >55 and ≤80 >35 and ≤50
F > 80 > 50
LOS Criteria - Highway Capacity Manual 2010
Level of Service (LOS) Overview
9. County of Fairfax, Virginia
Department of Transportation
9
AM Peak hr.: 7:45 AM to 8:45 AM
PM Peak hr.: 5:00 PM to 6:00 PM
Existing Conditions
SCENARIO
AM LOS &
Overall Intersection Delay
PM LOS &
Overall Intersection Delay
Existing - 2016
F
209.3 seconds
F
207.5 seconds
11. County of Fairfax, Virginia
Department of Transportation
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Mehr Farms
Proposed
Summerstone
Mehr Farms
As of October 2018,
Owned by
Fairfax County Board
of Supervisors
12. County of Fairfax, Virginia
Department of Transportation
12
Alternative A – T-Intersection
Alternative A
Pros
•Solves delay and queuing issues
•Incorporates improved access for Mehr
Farms and possible future development
west of existing intersection
Cons
•Unconventional southern intersection
– Improvement of this conceptual design in A.1
13. County of Fairfax, Virginia
Department of Transportation
13
Alternative B – Roundabout
Alternative B
Pros
•Improvement in LOS to C/C for 2040
AM/PM
•Reduces queuing
•Improves alignment at Balls Hill Road and
Old Dominion Drive intersection
Cons
•The cost and impacts associated with right-
of-way
•Poor access management east and west of
the intersection for developments
14. County of Fairfax, Virginia
Department of Transportation
14
Alternative C – Addition of Dedicated Left-Turn Lanes
Alternative C
Pros
•Improvement in LOS to D/E in 2040 AM/PM
•No major road link realignments (widens along
existing alignment)
Cons
•Poor access management of Mehr Farms
(Greyson Woods Lane) and potential future
development west of the intersection
15. County of Fairfax, Virginia
Department of Transportation
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Recommended Alternative
Alternative A.1 – T-Intersection Improved
16. County of Fairfax, Virginia
Department of Transportation
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Alternative A.1 – T-Intersection Improved
(Mehr Farms)
Alternative A.1
(Continued)
Pros
•Improved Access
management to and
from the Mehr Farm’s
development
•Future access
management west of
the intersection will also
be improved
17. County of Fairfax, Virginia
Department of Transportation
17
Alternative A.1 – T-Intersection Improved
Pedestrian Access
18. County of Fairfax, Virginia
Summary of Public Comments
• 32 comments received
• Many comments indicated an improvement is needed for
the congestion in the area
• Roundabout and T-Intersection (A.1) were the
suggested alternatives citizens preferred
• Pedestrian and cyclist access is important for mobility
and access to McLean’s Downtown and recreational use
• Improvement will ease cross-neighborhood access for
residents
Department of Transportation
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19. County of Fairfax, Virginia
Common Reasons Respondents Oppose Alts.
• Roundabout would be difficult to navigate
• Right-of-Way needs to be compared between the
Roundabout and T-Intersection Alternatives
• Better termination points for pedestrian connectivity
needs to be addressed in design
Department of Transportation
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20. County of Fairfax, Virginia
Right-of-Way at Mehr Farms Alternative B
Department of Transportation
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• Mehr Farms home cost is $1.8
Million +
• Roundabout requires 3 homes
to purchase at a minimum
estimate of $5.4 Million
– However, this number could
increase
21. County of Fairfax, Virginia
Right-of-Way Summerstone Alternative A.1
Department of Transportation
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• This site was approved for
4 new homes in April 2018
• Purchased in October 2018
• Provides space for
construction access and
room for storm water
management facilities
22. County of Fairfax, Virginia
Department of Transportation
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• Fall 2018
• Spring 2019 – Spring 2023
• Spring 2021 – Spring 2023
• Spring 2023 – Fall 2024
• Board of Supervisors approved $20.5 million local funding for
Balls Hill Road at Old Dominion Drive intersection improvement
on May 15, 2018.
Finalize Study
Preliminary Engineering Design
Right-of-Way Acquisition
Construction
Anticipated Project Schedule and Funding
23. County of Fairfax, Virginia
Department of Transportation
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Questions and Answers
For more information, visit
www.fairfaxcounty.gov/transportation/projects/balls-hill-road
or contact Gibran Abifadel at
Gibran.Abifadel@fairfaxcounty.gov
703-877-5600, TTY 711