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Reston Network Analysis: Tier 3 Mitigation Results: Sept. 26, 2016

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Reston Network Analysis: Tier 3 Mitigation Results: Sept. 26, 2016

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Reston Network Analysis: Tier 3 Mitigation Results: Sept. 26, 2016

  1. 1. County of Fairfax, Virginia 1 Reston Network Analysis Tier 3 Mitigation Results September 26th, 2016 Advisory Group Meeting Kristin Calkins Fairfax County Department of Transportation
  2. 2. County of Fairfax, Virginia Agenda • Study Purpose • Project Progress Overview • 2050 1st and 2nd Tier Mitigation Results • Tier 3 Alternatives • Tier 3 Results • Next Steps • Questions and Answers 2
  3. 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 of when larger projects are needed 3
  4. 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 4
  5. 5. 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) 5
  6. 6. County of Fairfax, Virginia Level of Service Standard • LOS E (55 – 80 seconds of average delay) 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 6
  7. 7. County of Fairfax, Virginia 2050 1st and 2nd Tier Mitigation Results 7
  8. 8. County of Fairfax, Virginia 2050 Tier 1 and 2 LOS Results Of 42 key signalized intersections in the study area, the number that are forecast to operate at Level of Service F are shown below: 8 42 Key Intersections – LOS F Peak Hour 2050 Unmitigated After 2050 1st Tier After 2050 2nd Tier AM 24 12 10 PM 26 12 12 In Both AM & PM 22 9 9 In Either AM or PM 27 14 12
  9. 9. County of Fairfax, Virginia 2050 Tier 1 and 2 Problem Locations Of 42 key signalized intersections in the study area, the following intersections have greater than 120 seconds of delay: 9 Intersections – 120+ Seconds of Delay Peak Hour 2050 Unmitigated After 2050 1st Tier After 2050 2nd Tier AM 17 12 8 PM 19 7 5 In Both AM & PM 14 5 4 In Either AM or PM 20 10 7
  10. 10. County of Fairfax, Virginia 2050 Problem Locations • Unmitigated had 22 Problem Locations • After Tier 1: 13 Problem Locations • After Tier 2: 9 Problem Locations – 3 were in the Innovation TSA, which has already been finalized – 6 were 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 Avenue 10
  11. 11. County of Fairfax, Virginia Network Analysis Follow-On Tasks Fairfax County Pkwy. & Spring St. Reston Pkwy. Capacity Improvements Fairfax County Pkwy. & Sunrise Valley Dr. 11
  12. 12. County of Fairfax, Virginia 2050 3rd Tier Recommendations 12
  13. 13. County of Fairfax, Virginia Tier 3 Alternatives Analysis • Options for Tier 3 mitigation were coordinated and developed with the Advisory Group and Stakeholders Group for: – Reston Parkway – Fairfax County Parkway & Spring Street/Sunset Hills Road – Fairfax County Parkway & Sunrise Valley Drive • Options were tested and evaluated based on LOS, cost, ROW need and context • The 2050 Tier 3 model incorporated the recommended improvements for each of the follow-on tasks 13
  14. 14. County of Fairfax, Virginia Reston Parkway Options • Option 1: Superstreets • Option 2: Lawyers Road Connection at Fox Mill Road • Option 3: Flyover from WB Sunset Hills Road to SB Reston Parkway • Option 4: Continuous flow intersection at Sunset Hills Road 14
  15. 15. County of Fairfax, Virginia Reston Parkway: Lawyers Road Connection 15 Remove Left Turn Bays New Intersection
  16. 16. County of Fairfax, Virginia Fairfax County Parkway & Spring Street Road /Sunset Hills Road • Option 1: Fairbrook Drive Ramp & new signal • Option 2: Bi-Directional Ramp • Option 3: Ramp to NB Fairfax County Parkway 16
  17. 17. County of Fairfax, Virginia Fairfax County Parkway: Fairbrook Drive Ramp 17
  18. 18. County of Fairfax, Virginia Fairfax County Parkway & Sunrise Valley Drive • Option 1: Tight Diamond Interchange; Fairfax County Parkway overpass over Sunrise Valley Drive • Option 2: Single Point Urban Interchange (SPUI); Fairfax County Parkway overpass over Sunrise Valley Drive 18
  19. 19. County of Fairfax, Virginia Fairfax County Parkway: SPUI 19 Sunrise Valley Drive
  20. 20. County of Fairfax, Virginia Other Changes in Tier 3 Modifications to the Tier 3 Model compared to Tier 2 • Reston Parkway at Sunrise Valley Drive – EB dual lefts, thru lane, shared thru/right • Reston Parkway at WB Baron Cameron Avenue – WB dual lefts • Sunset Hills Road at Soapstone Drive Connector – NB left turn lane & right turn lane – WB left turn lane 20
  21. 21. County of Fairfax, Virginia Other Changes in Tier 3 (Cont.) • Left turn lanes: – SB Soapstone Drive at Sunrise Valley Drive – SB Pinecrest Road extension at Sunrise Valley Drive – NB & WB Sunset Hills Road at grid link east of Soapstone – EB & WB Sunset Hills Road at Michael Faraday – EB Sunset Hills Road at Library Street extended 21
  22. 22. County of Fairfax, Virginia 2050 3rd Tier Mitigation Results 22
  23. 23. County of Fairfax, Virginia 2050 Unmitigated Problem Locations 23
  24. 24. County of Fairfax, Virginia 2050 1st Tier Problem Locations 24
  25. 25. County of Fairfax, Virginia 2050 2nd Tier Problem Locations 25
  26. 26. County of Fairfax, Virginia 2050 3rd Tier Problem Locations 26
  27. 27. County of Fairfax, Virginia 2050 Problem Locations Intersections – 120+ Seconds of Delay Peak Hour 2050 Unmitigated After 2050 1st Tier After 2050 2nd Tier After 2050 3rd Tier AM 17 12 8 2 PM 19 7 5 1 In Both AM & PM 14 5 4 0 In Either AM or PM 20 10 7 2 Of the 42 key signalized intersections, only 2 continue to have 120 seconds of delay or greater after Tier 3 Mitigation. 27 • Reston Parkway at South Lakes Drive: PM 138 Seconds • Centreville Road & Sunrise Valley Drive: PM 138 Seconds* In Innovation TSA.
  28. 28. County of Fairfax, Virginia Tier 3 Problem Locations Reston Parkway at South Lakes Drive • 138 seconds of average delay in the AM Peak 28
  29. 29. County of Fairfax, Virginia Tier 3 LOS Results Of the 42 key signalized intersections, only 4 continue to have 80 seconds of delay or greater after Tier 3 Mitigation. Of these, 3 are on Centreville Road 42 Key Intersections – LOS F Peak Hour 2050 Unmitigated After 2050 1st Tier After 2050 2nd Tier After 2050 3rd Tier AM 24 12 10 4 PM 26 12 12 7 In Both AM & PM 22 9 9 3 In Either AM or PM 27 14 12 8 29 *4 Interactions that operate at LOS F after 3rd Tier are in the Innovation Area
  30. 30. 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 – 123 seconds in AM & 88 seconds of delay in the PM • Reston Parkway at Sunset Hills Road – 83 seconds of delay in the PM • 4 intersections in Innovation TSA 30
  31. 31. County of Fairfax, Virginia Tier 3 LOS F Intersections (Cont.) Fairfax County Parkway at Baron Cameron Avenue • 100 seconds of average delay in the PM Peak 31
  32. 32. County of Fairfax, Virginia Reston Parkway at Sunrise Valley Drive • 92 seconds of average delay in the PM Peak Tier 3 LOS F Intersections (Cont.) 32
  33. 33. County of Fairfax, Virginia Tier 3 LOS F Intersections (Cont.) Reston Parkway at Sunset Hills Road • 83 seconds of average delay in the PM Peak 33
  34. 34. County of Fairfax, Virginia Next Steps • 2050 Phasing Analysis • 2050 VISSIM for Dulles Toll Road • 2030 VISUM Analysis of network • Roadway classification of grid links using DRPT Urban Street Guidelines 34
  35. 35. County of Fairfax, Virginia Schedule 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 9/26/16 35
  36. 36. 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/ 36

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