Reston Network Analysis: 2030 Results and Roadway Classifications

1. County of Fairfax, Virginia
1
Reston Network Analysis
2030 Results & Roadway Classifications
March 13, 2017: Advisory Group Meeting
March 17, 2017: Stakeholders Meeting
Kristin Calkins
Fairfax County Department of Transportation

2. County of Fairfax, Virginia
Agenda
• Study Purpose
• Project Progress Overview
• 2050 Network & Results
• Project Prioritization
• 2030 Network & Results
• Grid of Streets – Roadway Classifications
• Next Steps
• Questions and Answers
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3. County of Fairfax, Virginia
Purpose of Study
• Conduct a detailed analysis of the grid of streets
to determine:
– Number of lanes between and at intersections
– How to best serve pedestrians, bikes and transit
– Right-of-way needs
• Assign urban street types and modal emphasis
based on Department of Rail and Public
Transportation Multimodal System Design
Guidelines
• Conduct a phasing analysis to estimate when
larger projects are needed
3

4. Data
Collection
• Traffic
Counts in
June 2015
• Travel Time
Runs
Existing
Conditions
• Capacity
Analysis
• Level of
Service
Test Grid of
Streets (2030
& 2050)
• Traffic
Forecasting
Capacity
Analysis
• Level of
Service
Mitigation
• Signal re-
timing
• New links
• Turn lanes
• Additional
lanes
Roadway
Classification
• DRPT Design
Guidelines
• Bike lanes
• Sidewalks/
Pedestrian
routes
• On-Street
Parking
• Transit Routes
Finalize Grid of
Streets (2030
& 2050)
Based on:
• Advisory Group
input
• Stakeholder
input
• Community
input
Phasing
Analysis
• Prioritization
of larger
projects
Network Analysis Project Process
Advisory Group input, Stakeholder input, Community input
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5. County of Fairfax, Virginia
Level of Service Standard
• LOS E (55 – 80 seconds of average delay for
signalized intersections) is the standard for the
Reston Transit Station Areas
• LOS F (greater than 80 seconds of average delay)
is considered operationally failing
• Greater than 120 seconds of delay is set as a
benchmark for problem locations in the Network
Analysis
• These locations will likely need significant mitigation
measures.
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6. County of Fairfax, Virginia
Mitigation Options
• Mitigation Measures - Tiered Approach
– Tier 1: No right of way (ROW) impact
– Tier 2: Some right of way impact
– Tier 3: Large scale mitigations
• Each grid link is initially assumed to be one
lane in each direction (with bike/ped facilities
as specified in the Comprehensive Plan)
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7. County of Fairfax, Virginia
2050 Network & Results
7

8. County of Fairfax, Virginia
2050 (Full Buildout) Network
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9. County of Fairfax, Virginia
Full Buildout Network
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• All grid links are one lane in each direction
• Widening of Fairfax County Parkway to 6 lanes w/ HOV as
lanes 5 & 6
• South Lakes Overpass at Dulles Toll Road
• Soapstone Overpass at Dulles Toll Road
• Town Center Underpass at Dulles Toll Road
• Interchange improvements on Fairfax County Parkway at
– Sunrise Valley Drive
– Spring Street
• Extension of Pinecrest Road

10. County of Fairfax, Virginia
Full Buildout Network (Cont.)
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• Widening of Fox Mill Road: Reston Parkway to Monroe Street
• Widening of West Ox Road: Lawyers Road to Centreville
Road
• Loop road through Reston Park & Ride: Reston Parkway to
Lawyers Road
• Rock Hill Road Overpass at DTR
• Extension of McLearen Road: West Ox Road to Reston
Parkway
• Widening of Monroe Street from Fox Mill Road to Town of
Herndon
• Reston Parkway Widening: South Lakes Drive to DTR

11. County of Fairfax, Virginia
Full buildout Signals
11
26 New Signals
Sunrise Valley Dr. @ Wood Oak Dr. Sunrise Valley Dr. @ Commerce Park Dr. East
Sunrise Valley Dr. @ Colts Brook Dr. Soapstone Overpass @ Indian Ridge Rd. Extension
Frying Pan Rd. @ Greg Roy Ln. Sunset Hills Rd. @ West of Town Center Pkwy.
Monroe St. @ Future Connection to Herndon Metro Town Center Pkwy. @ North of Sunset Hills
Glade Dr. @ Pinecrest Rd. Town Center Pkwy. @ Market St.
South Lakes Dr. @ Pinecrest Rd. Sunset Hills Rd. @ Library St.
Sunrise Valley Dr. @ Pinecrest Rd. Extended Sunset Hills Rd. @ Soapstone Overpass
Sunrise Valley Dr. @ Town Center Pkwy. Sunset Hills Rd. @ East of Soapstone Overpass
Town Center Pkwy. @ North of Sunrise Valley Dr. Sunset Hills Rd. @ South Lakes Overpass
West of Reston Pkwy. with grid street Reston Station Blvd. @ Metro Center Dr.
Sunrise Valley Dr. @ Roland Clarke Place Reston Station Blvd. @ Michael Faraday Dr.
Sunrise Valley Dr. @ Indian Ridge Rd.
Isaac Newton Square S. @ Isaac Newton Square
W.
Sunrise Valley Dr. @ Commerce Park Dr. West Wiehle Ave. @ Isaac Newton Square N.

12. County of Fairfax, Virginia
Full Buildout Network - Signals
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13. County of Fairfax, Virginia
Full Buildout 3rd Tier Problem Locations
(After Tier 3 Mitigation)
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14. County of Fairfax, Virginia
Full Buildout Problem Locations
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Intersections – 120+ Seconds of Delay
Intersections
2050
Unmitigated
After 2050
1st Tier
After 2050
2nd Tier
After 2050
3rd Tier
20 10 7 1*
With Tier 3 mitigations a significant reduction in
the projected number of intersections
experiencing delays in excess of 120 seconds
can be seen.
*Centreville Road & Sunrise Valley Drive: PM 138 seconds in Innovation TSA.
• The intersection was included in the analysis of the Innovation TSA.
There is ongoing evaluation of the improvements at this location.

15. County of Fairfax, Virginia
Remaining LOS F Intersections
Of the 42 key signalized intersections on the major roadways
in the Reston TSA, only 5 continue to have 80 seconds of
delay or greater after Tier 3 Mitigation.
42 Key Intersections – LOS F
Peak Hour
2050
Unmitigated
After
2050 1st Tier
After
2050 2nd Tier
After
2050 3rd Tier
Total 24 11 9 5
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16. County of Fairfax, Virginia
Tier 3 LOS F Intersections
• Fairfax County Parkway at Baron Cameron Avenue
– 100 seconds of delay in the PM
• Reston Parkway at Sunrise Valley Drive
– 92 seconds of delay in the PM
• Reston Parkway at South Lakes Drive
– 95 seconds of delay in the AM
• Reston Parkway at Sunset Hills Road
– 83 seconds of delay in the PM
• Centreville Road at Sunrise Valley Drive
– Innovation TSA
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17. County of Fairfax, Virginia
Project Prioritization
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18. County of Fairfax, Virginia
Phasing Analysis
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• Conducted for Existing Conditions and Full Buildout
– AM and PM peak hours
• Showed which projects had the greatest benefit in each
scenario
• Showed hours saved during the peak hours
• Informed how projects were prioritized

19. County of Fairfax, Virginia
Phasing Analysis Results
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Improvements Description
2016
Hours
Saved
2050
Hours
Saved
1 Grid of Streets Construct an enhanced grid of streets to increase connectivity 1,216 4,817
2 Town Center
Town Center Parkway Underpass (4 lanes) from Town Center Parkway
and Sunset Hills Road to Sunrise Valley Drive
374 1,322
3 FCP/HOV Widen Fairfax County Parkway: 6 lanes with HOV lane(s) 299 851
4 Soapstone
Soapstone Overpass (3 lanes) across the DTR from Sunset Hills Road
to Sunrise Valley Drive
300 600
5 Sunset Hills
Widen Sunset Hills Road: 6 lanes from Wiehle Ave to Fairfax County Pkwy,
and 4 lanes from Wiehle Ave to Hunter Mill Road
257 478
6 Fox Mill Widen Fox Mill Road: 4 lanes from Reston Parkway to Monroe Street 0 714
7 South Lakes
South Lakes Overpass (4 lanes ) across the DTR from Sunset Hills Road
to Sunrise Valley Drive
240 462
8 FCP/SRV
Grade-separated interchange at Fairfax County Parkway and Sunrise
Valley Drive
184 514
9 Reston Pkwy Widen Reston Parkway: 6 lanes from South Lakes Drive to the DTR 82 313
10 West Ox Widen West Ox Road: 4 lanes from Lawyers Road to Centreville Road -28 253
11 Monroe Widen Monroe Street: 4 lanes from West Ox Road to Town of Herndon 27 154
12 Pinecrest Extend Pinecrest Road from South Lakes Drive to Sunrise Valley Drive 2 118

20. County of Fairfax, Virginia
Project Prioritization
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Priority 1
1. Soapstone Overpass
2. Town Center Underpass
3. Reston Parkway Widening
4. Fairfax County Parkway Widening/HOV (from West Ox to the Dulles Toll
Road)
Priority 2
1. Sunrise Valley Drive/Fairfax County Parkway Interchange
2. South Lakes Overpass
3. Fox Mill Widening
Priority 3
1. West Ox Road Widening
2. Monroe Street Widening
3. Pinecrest extension

21. County of Fairfax, Virginia
2030 Network & Results
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22. County of Fairfax, Virginia
Mid Buildout Scenario
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• 2030 is a representation of the ‘mid buildout’
of the Reston TSAs
• Assumptions about development levels and
improvements were made by the Department
of Planning and Zoning (DPZ)
• Helps staff understand where improvements
may be needed to support a midpoint in
development

23. County of Fairfax, Virginia
Bid Buildout Improvements
23
• Roadways:
– Soapstone Connector
– Town Center Parkway Underpass
– Reston Parkway – 6 lanes from EB DTR to South
Lakes Drive
• Intersection Modifications:
– Reston Parkway & Sunrise Valley Drive
– Reston Parkway & South Lakes Drive
– Reston Parkway & Baron Cameron Avenue

24. County of Fairfax, Virginia
Mid Buildout Improvements (Cont.)
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• New Signals
– Town Center Parkway north of Sunset Hills Road
– New Dominion Parkway and Explorer Street
– Soapstone Connector and Sunset Hills Road
– Reston Station Boulevard Extended and Sunset
Hills Road
– Sunrise Valley Drive and Town Center Parkway

25. County of Fairfax, Virginia
Mid Buildout Grid
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26. County of Fairfax, Virginia
Tier 3 LOS F Intersections
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• Fairfax County Parkway at Sunrise Valley Drive
– 132 seconds of delay in the AM, ok in PM
• Sunset Hills Road at Town Center Parkway
– 123 seconds of delay in the AM, ok in PM
• Reston Parkway at South Lakes Drive
– 143 seconds of delay in the AM, ok in PM
• Sunrise Valley Drive at Hunter Mill Road
– 121 seconds of delay in the AM, ok in PM
• Sunset Hills Road at Hunter Mill Road
– 87 seconds of delay in the AM, ok in the PM
• Sunrise Valley Drive at Preston White Drive/South Lakes Drive
– 113 seconds of delay in the PM, ok in the AM

27. County of Fairfax, Virginia
Mid Buildout LOS F Intersections
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28. County of Fairfax, Virginia
Mid Buildout LOS F Intersections
Fairfax County Parkway at Sunrise Valley Drive
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2030 2050
Same geometry as existing conditions. Single Point Urban Interchange and 6
lane widening of Fairfax County Parkway
AM: 132 sec.
PM: 64 sec.
AM: 64 sec.
PM: 53 sec.

29. County of Fairfax, Virginia
Mid Buildout LOS F Intersections
Town Center Parkway and Sunset Hills Road
29
2030 2050
Sunset Hills Road 4 lanes. Sunset Hills Road 6 lanes.
AM: 123 sec.
PM: 76 sec.
AM: 67 sec.
PM: 61 sec.

30. County of Fairfax, Virginia
Mid Buildout LOS F Intersections
Reston Parkway at South Lakes Drive
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2030 2050
AM: 143 sec.
PM: 71 sec.
AM: 95 sec.
PM: 71 sec.
No Fox Mill Widening or Pinecrest
Road Extension
Includes Fox Mill Widening or
Pinecrest Road Extension

31. County of Fairfax, Virginia
Mid Buildout LOS F Intersections
Sunrise Valley Drive at Hunter Mill Road
31
2030 2050
Sunrise Valley
Drive
HunterMillRoad
AM: 121 sec.
PM: 60 sec.
AM: 39 sec.
PM: 33 sec.
No South Lakes Crossing
HunterMillRoad
Sunrise Valley
Drive
Includes South Lakes Crossing
*The Hunter Mill Road Study has Recommendations influencing this intersection

32. County of Fairfax, Virginia
Mid Buildout LOS F Intersections
Sunset Hills Road at Hunter Mill Road
32
2030 2050
Sunset Hills Road
HunterMillRoad
AM: 87 sec.
PM: 64 sec.
AM: 71 sec.
PM: 34 sec.
No South Lakes Crossing
HunterMillRoad
Sunset Hills Road
Includes South Lakes Crossing
*The Hunter Mill Road Study has Recommendations influencing this intersection

33. County of Fairfax, Virginia
Mid Buildout LOS F Intersections
Sunrise Valley Drive at South Lakes Drive
33
2030 2050
AM: 72 sec.
PM: 113 sec.
AM: 64 sec.
PM: 78 sec.
No South Lakes Crossing Includes South Lakes Crossing
To South Lakes
Crossing

34. County of Fairfax, Virginia
Mid Buildout Scenario Summary
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• Only seven intersection have issues
• Improvements in place by 2050 will result in
acceptable operations
• County staff will continue to assess
transportation and development in Reston and
will modify recommendations as necessary

35. County of Fairfax, Virginia
Urban Street Standards
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36. County of Fairfax, Virginia
Reston TSAs Full Buildout # of Lanes
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37. County of Fairfax, Virginia
Reston TSAs Full Buildout Bike Network
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38. County of Fairfax, Virginia
Wiehle TSA – Roadway Classifications
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39. County of Fairfax, Virginia
Reston Town Center
TSA – Roadway
Classifications
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40. County of Fairfax, Virginia
Herndon TSA – Roadway Classifications
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41. County of Fairfax, Virginia
Next Steps
• Community Meeting April (TBD)
• Public Comment
• Documentation
• Final Report Summer 2017
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42. County of Fairfax, Virginia
Schedule
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Task Description
1A Land Use and Networks - Task is Complete
1B Traffic Counts - Task is Complete
2A Establish Existing Conditions - Task is Complete
2B Calibrate Against Existing Conditions - Task is Complete
3A2 Analyze Future Conditions (2050) - Task complete advance
to Tier 3 Mitigation
3A1 Analyze Future Conditions (2030)
3B Simulation of the Dulles Toll Road
4A Meetings/Presentations
5A Phasing Analysis - Existing Conditions- Ths Task is complete
5B Phasing Analysis - 2050 - Optional
6 Determination of DRPT Guidelines Roadway Classification
7 Documentation
8 Reston Parkway Capacity Improvements
9 Fairfax County Parkway & Spring Street Interchange
10 Fairfax County Parkway & Sunrise Valley Drive
11 Rock Hill Bridge at Sunrise Valley Drive
12A Meetings/Presentations
07
3/17

43. County of Fairfax, Virginia
Questions & Comments
For questions and comments about the study please
contact:
Kristin Calkins: Kristin.Calkins@fairfaxcounty.gov
(703) 877-5710
http://www.fairfaxcounty.gov/fcdot/restonnetworkanalysis/
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