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Reston Network Analysis: Existing Phasing Analysis and 2050 Tier 3

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Reston Network Analysis: Existing Phasing Analysis and 2050 Tier 3

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Reston Network Analysis: Existing Phasing Analysis and 2050 Tier 3

  1. 1. County of Fairfax, Virginia Reston Network Analysis Existing Phasing Analysis & 2050 Tier 3 August 8 & 10, 2016 Advisory Group & Stakeholders Meeting Kristin Calkins Fairfax County Department of Transportation
  2. 2. 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 of when larger projects are needed 2
  3. 3. 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
  4. 4. County of Fairfax, Virginia Phasing Analysis Existing Conditions 4
  5. 5. County of Fairfax, Virginia Existing Conditions Phasing Analysis 5 • This process will help the prioritize roadway improvements in the Reston TSAs • Based on greatest improvement in congestion compared the network without the project • When Tier 3 is finalized a 2050 phasing analysis will be completed to determine long term importance
  6. 6. County of Fairfax, Virginia Existing Conditions Phasing Analysis 6 Reston Phasing Analysis Projects Grid of Streets DTR Crossing at Soapstone Overpass – Sunrise Valley Dr to Sunset Hills Rd DTR Town Center Parkway Underpass – Sunrise Valley Dr to Sunset Hills Rd Fox Mill Road Widening – Reston Parkway to Monroe Street Monroe Street Widening – West Ox Road to Town of Herndon Pinecrest Road Extension – South Lakes Dr to Sunrise Valley Dr Reston Parkway Widening – South Lakes Drive to DTR Fairfax County Parkway - DTR to West Ox HOV Fairfax County Parkway at Sunrise Valley Drive (Interchange) South Lakes Drive Overpass – Sunrise Valley Drive to Sunset Hills Rd West Ox Road Widening – Lawyers Road to Centreville Road Sunset Hills Road Widening – Fairfax County Parkway to Wiehle (6) and Wiehle to Hunter Mill Road (4)
  7. 7. County of Fairfax, Virginia Existing Conditions Phasing Analysis 7
  8. 8. County of Fairfax, Virginia Phasing Analysis Process • The base year (2015) VISUM AM and PM peak hour models were the starting point for the phasing analysis. • Each planned improvement was added to the base year VISUM model. • Vehicle hours travelled (VHT) were used to measure traffic congestion and benefit of each improvement. 8
  9. 9. County of Fairfax, Virginia Results – Existing Phasing Analysis 9 Improvement Ranking Hours of Delay w/ Project vs. Existing Conditions Grid of Street Grid of Streets 1 -1,216 Town Center Town Center Parkway Underpass 2 -374 Soapstone Soapstone Overpass 3 -300 FCP/HOV Fairfax County Parkway - 6 lanes with High Occupancy Vehicle (HOV) lane(s) 4 -299 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 5 -257 South Lakes South Lakes Overpass 6 -240 FCP/SRV Fairfax County Parkway and Sunrise Valley Drive Interchange 7 -184 Reston Pkwy Widen Reston Parkway - 6 lanes from South Lakes Drive to the DAAR 8 -82 Monroe Widen Monroe Street - 4 lanes from West Ox Road to the Town of Herndon 9 -27 Pinecrest Extend Pinecrest Road from South Lakes Drive to Sunrise Valley Drive 10 -2 Fox Mill Widen Fox Mill Road - 4 lanes from Reston Parkway to Monroe Street 11 0 West Ox Widen West Ox Road - 4 lanes from Lawyers Road to Centreville Road 12 28
  10. 10. County of Fairfax, Virginia Tier 3 10
  11. 11. 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 if needed – Consultation with Advisory Group and Stakeholders • Each grid link is initially assumed to be one lane in each direction (with bike/ped facilities as specified in the Comprehensive Plan) – No turn lanes were initially assumed at new intersections 11
  12. 12. County of Fairfax, Virginia 2050 2nd Tier Problem Locations 12 • Unmitigated had 22 Problem Locations • After Tier 1: 13 Problem Locations • After Tier 2: 9 Problem Locations – 3 are in Innovation TSA which has already been finalized – 6 are associated with identified follow-on tasks • Fairfax County Parkway & Spring Street • Fairfax County Parkway & Sunrise Valley Drive • Reston Parkway: From Lawyers Road to Baron Cameron Ave.
  13. 13. County of Fairfax, Virginia 13 2050 2nd Tier Problem Locations
  14. 14. County of Fairfax, Virginia 14 Network Analysis Follow-On Tasks Fairfax County Pkwy. & Spring St. Reston Pkwy. Capacity Improvements Fairfax County Pkwy. & Sunrise Valley Dr.
  15. 15. County of Fairfax, Virginia Fairfax County Parkway & Spring Street 15
  16. 16. FCP & Spring Street No Build Lane Configuration & PM LOS Intersection No-build LOS (PM) Fairfax County Parkway & Spring Street Ramp B Spring Street & Fairfax County Parkway Ramp F Spring Street & Herndon Parkway C Pros Cons • Improves conditions on Spring Street and Herndon Parkway • Removes slip ramp to southbound Fairfax County Parkway 16 F B
  17. 17. FCP & Spring Street Option 1: Fairbrook Drive Ramp Pros Cons • Maintains existing traffic patterns • Operating conditions are acceptable • Geometry for ramp curvature will need to be investigated Lane Configuration & PM LOS Intersection No-build LOS (PM) Option 1 LOS (PM) Fairfax County Parkway & Spring Street Ramp B B Spring Street & Fairfax County Parkway Ramp F D Spring Street & Herndon Parkway C C Fairbrook Dr & Fairfax County Parkway Ramp - B 17 D B B
  18. 18. FCP & Spring Street Option 2: Bi-Directional Ramp Pros Cons • Eliminates traffic signal along Fairfax County Parkway for improved operating conditions over no- build scenario • Installation of a traffic signal on Spring Street on the west side of Fairfax County Parkway • Construction of loop ramp requires large property takings • Operating conditions at the new signalized intersection are at capacity during the AM peak hour. • Creating a direct connection from the toll road may be confusing for drivers. Lane Configuration & PM LOS Intersection No-build LOS (PM) Option 2 LOS (PM) Spring Street & Fairfax County Parkway Ramp F D Spring Street & Herndon Parkway C C Sunset Hills Road & Fairfax County Parkway NB exit ramp - D D D
  19. 19. FCP & Spring Street Option 3: Ramp to NB FCP Pros Cons • Eliminates traffic signal along Fairfax County Parkway for improved operating conditions over No-build • Smaller area of impact over loop ramps • Individual intersections provide for less delay with all intersections operating at LOS D or better during the peak hours. • Installation of a traffic signal on Spring Street on the west side of Fairfax County Parkway • A new weave is created along Fairfax County Parkway between the Toll Road and Spring Street. Lane Configuration & PM LOS Intersection No-build LOS (PM) Option 3 LOS (PM) Spring Street & Fairfax County Parkway Ramp F C Spring Street & Herndon Parkway C C Sunset Hills Road & Fairfax County Parkway NB exit ramp - C C C
  20. 20. County of Fairfax, Virginia Fairfax County Parkway & Sunrise Valley Drive 20
  21. 21. FCP & Sunrise Valley Drive No Build Intersection No-build LOS (PM) Fairfax County Parkway & Sunrise Valley Drive F Pros Cons • Does not require construction or new right-of-way • Travelers will experience delays in excess of 100 seconds No Build Assumes Fairfax County Parkway is Widened to 6 lanes F
  22. 22. FCP & SRVD Option 1: Single Point Urban Interchange (SPUI) Pros Cons • Provides improved operating conditions over No-build • One signalized intersection • Queuing does not impact adjacent intersections • Large area of impact compared to a tight diamond for the approach ramps • Larger crossing distances for pedestrians Intersection No-build LOS (PM) Option 1 LOS (PM) Fairfax County Parkway & Sunrise Valley Drive F D 22 D Fairfax County Parkway Bridge over Sunrise Valley Drive
  23. 23. FCP & SRVD Option 2: Tight Diamond Interchange Pros Cons • Provides improved operating conditions over No-build • Potentially smaller area of impact over SPUI • Queues impact adjacent intersections • Requires an additional signalized intersection • Signal coordination between intersections can be a concern and lead to vehicles getting “trapped” between intersections and creating additional delay Intersection No-build LOS (PM) Option 2 LOS (PM) Fairfax County Parkway & Sunrise Valley Drive F - Fairfax County Parkway (NB) & Sunrise Valley Drive - D Fairfax County Parkway (NB) & Sunrise Valley Drive - D 23 D D Fairfax County Parkway Bridge over Sunrise Valley Drive Graphic is illustrative, intersections would be constructed closer together
  24. 24. County of Fairfax, Virginia Reston Parkway 24
  25. 25. County of Fairfax, Virginia Reston Parkway 25 • Option 1: Super Streets – Restricted left turns at: • Spectrum Drive • Bowman Towne/Green Drive • New Dominion Parkway • Bluemont Way/Stratford Park Place • South Lakes Drive • Glade Drive • Fox Mill Road – U-Turns at: • Between Bowman Towne Drive and Baron Cameron • Market Street/Stratford House Place • Sunrise Valley Drive • Between South Lakes Drive and Glade Drive • Between Glade Drive and Colts Neck Road • Colts Neck Road • Option 2 – Flyover from WB Sunset Hills Road to SB Reston Parkway – New Road connecting Lawyers Road to Fox Mill Road behind Park & Ride
  26. 26. County of Fairfax, Virginia Bowman Towne Drive 26 Reston Parkway Alternatives Stratford House Place Market Street Baron Cameron Avenue No-Build Super Street New Dominion Parkway *Pedestrian Signal Bluemont Way Sunset Hills Road WB DTR EB DTR Bowman Towne Drive Stratford House Place Market Street Baron Cameron Avenue Convert to Median U-Turns Bluemont Way Sunset Hills Road WB DTR EB DTR Dual WB Left Turns Median U-Turns No Left Turns New Dominion Parkway No Left Turns No Left Turns Bowman Towne Drive Stratford House Place Market Street Baron Cameron Avenue Sunset Fly Over & Lawyers Bypass New Dominion Parkway *Pedestrian Signal Bluemont Way Sunset Hills Road WB DTR EB DTR Dual WB Left Turns WB Left Flyover Ramp
  27. 27. County of Fairfax, Virginia Colts Neck Road Colts Neck Road Fox Mill RoadFox Mill Road 27 Reston Parkway Alternatives (Cont.) No-Build WB DTR EB DTR Sunrise Valley Drive Right In/Right Out South Lakes Drive Glade Drive Lawyers Road WB DTR EB DTR Right In/Right Out No Left Turns Sunrise Valley Drive South Lakes Drive Glade Drive Lawyers Road NB U-Turn No NB/SB Left Turns Median U-Turns Median U-Turns U-Turns No NB Lefts Colts Neck Road Fox Mill Road WB DTR EB DTR Sunrise Valley Drive Right In/Right Out South Lakes Drive Glade Drive No NB Lefts Super Street Sunset Fly Over & Lawyers Bypass
  28. 28. County of Fairfax, Virginia Bowman Towne Drive 28 Reston Parkway LOS Results Stratford House Place Market Street Baron Cameron Avenue No-Build New Dominion Parkway *Pedestrian Signal Bluemont Way Sunset Hills Road WB DTR EB DTR Bowman Towne Drive Stratford House Place Market Street Baron Cameron Avenue Median U-Turns Bluemont Way Sunset Hills Road WB DTR EB DTR Dual WB Left Turns Median U-Turns No Left Turns New Dominion Parkway No Left Turns No Left Turns Bowman Towne Drive Stratford House Place Market Street Baron Cameron Avenue New Dominion Parkway *Pedestrian Signal Bluemont Way Sunset Hills Road WB DTR EB DTR Dual WB Left Turns WB Left Flyover Ramp 96 Seconds 66 Seconds 66 Seconds 16 Seconds 26 Seconds 16 Seconds 38 Seconds 19 Seconds 38 Seconds 2 Seconds 32 Seconds 2 Seconds 62 Seconds 34 Seconds 62 Seconds 85 Seconds 106 Seconds 57 Seconds 36 Seconds 48 Seconds 36 Seconds 15 Seconds 16 Seconds 15 Seconds Super Street Sunset Fly Over & Lawyers Bypass 13.7 Seconds
  29. 29. County of Fairfax, Virginia Colts Neck Road Colts Neck Road Fox Mill RoadFox Mill Road 29 Reston Parkway LOS Results (Cont.) No-Build WB DTR EB DTR Sunrise Valley Drive Right In/Right Out South Lakes Drive Glade Drive Lawyers Road WB DTR EB DTR Right In/Right Out No Left Turns Sunrise Valley Drive South Lakes Drive Glade Drive Lawyers Road NB U-Turn No NB/SB Left Turns Median U-Turns Median U-Turns U-Turns No NB Lefts Colts Neck Road Fox Mill Road WB DTR EB DTR Sunrise Valley Drive Right In/Right Out South Lakes Drive Glade Drive No NB Lefts 36 Seconds 48 Seconds 36 Seconds 15 Seconds 16 Seconds 15 Seconds 105 Seconds 132 Seconds 105 Seconds 92 Seconds 87 Seconds 92 Seconds 50 Seconds 45 Seconds 50 Seconds 172 Seconds 81 Seconds 99 Seconds 152 Seconds 159 Seconds 151 SecondsLawyers Road Super Street Sunset Fly Over & Lawyers Bypass 5 Seconds 47 Seconds 25 Seconds
  30. 30. County of Fairfax, Virginia Reston Parkway Volumes 30 • Reston Parkway is projected to carry similar volumes to Fairfax County Parkway (FCP) 2050 PM Peak Hour Volumes Fairfax County Pkwy Reston Pkwy Comparison Sunrise Valley Drive NB Approach 2071 1968 -103 SB Approach 2586 2665 +79 Between DTR Ramps NB 2510 2386 -124 SB 2775 3010 +235 Sunset Hills Road NB Approach 2343 2543 +200 SB Approach 2062 2154 +92 Baron Cameron Avenue NB Approach 2746 1650 -1096 SB Approach 1163 458 -705
  31. 31. County of Fairfax, Virginia Reston Parkway Take Away 31 • Reston Parkway carries a significant portion of north/south traffic in the area • At grade mitigation to LOS E is challenging • Grade separations are not appropriate for the area’s character • Discuss possibility of accepting locations with LOS F along Reston Parkway • Fairfax County Parkway improvements could improve Reston Parkway
  32. 32. County of Fairfax, Virginia Next Steps • Advisory Group Meeting Monday, September 12 • Tier 3 VISUM Analysis 32
  33. 33. County of Fairfax, Virginia Schedule 33 Task Description 2015 May 15 June 15 July 15 Aug 15 Sep 15 Oct 15 Nov 15 Dec 15 Jan 16 Feb 16 Mar 16 April 16 May 16 June 16 July 16 Aug 16 Sep 15 Oct 15 Nov 16 Dec 16 Jan 17 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 08/8/16
  34. 34. County of Fairfax, Virginia Discussion • Fairfax County Parkway & Spring Street – Staff recommends Option 1 • Fairfax County Parkway & Sunrise Valley Drive – Alternatives are Comparable • Reston Parkway – Discussion of alternatives and possible approach – Possible ideas on how to improve Reston Parkway 34
  35. 35. 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/ 35

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