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Reston Network Analysis: Existing Conditions

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Reston Network Analysis: Existing Conditions

Nov. 9, 2015

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Reston Network Analysis: Existing Conditions

  1. 1. County of Fairfax, Virginia Department of Transportation Reston Network Analysis Existing Conditions November 9, 2015 Kristin Calkins Fairfax County Department of Transportation
  2. 2. County of Fairfax, Virginia Reston Transportation Recommendations Improvements from Reston Phase I Plan Amendment Department of Transportation 2 • An Enhanced Street Network to increase connectivity • Town Center Parkway Underpass • Soapstone Drive Overpass • South Lakes Drive Overpass • Grade Separate Fairfax County Parkway/Sunrise Valley Drive
  3. 3. County of Fairfax, Virginia Enhanced Street Network Department of Transportation 3 • Maintains a balance between land use and transportation • Provide alternate routes through the TSAs for all modes • Ensures pedestrian mobility throughout the Transit Station Areas (TSAs) • Provides connectivity for bikes • Support bus service to Metrorail • Strengthened by a strong Transportation Demand Management (TDM) program in the TSAs
  4. 4. 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 Department of Transportation 4
  5. 5. County of Fairfax, Virginia Reston Network Analysis Tasks 1. Data Collection – done 2. Existing Conditions – being finalized 3. Future Conditions – coordination beginning – Determine Grid of Streets 1. Phasing Analysis 2. DRPT Classifications 3. Specific location improvements for additional study – Reston Parkway – Sunrise Valley Drive @ Fairfax County Parkway – Spring Street @ Fairfax County Parkway – Rock Hill Bridge Department of Transportation 5
  6. 6. Network Analysis Project Process Advisory Group input, Stakeholder input, Community input
  7. 7. County of Fairfax, Virginia Overview of Existing Conditions • Data Collection • Vehicular Level of Service • Existing Pedestrian Facilities • Existing Bike Facilities • Existing Transit Service • Future Trip Generation • Next Steps Department of Transportation 7
  8. 8. County of Fairfax, Virginia Analysis Needs for Existing Conditions Data Needs • Intersections Counts: May 2015: Vehicles & Pedestrians • Intersections Queue Measurement: May 2015 • Travel Time Runs: May 2015 • Synchro Networks: From VDOT • Driveway locations: Aerial Survey • VISSIM DTR Network: MWAA • VISUM Network: Created for project Department of Transportation 8
  9. 9. County of Fairfax, Virginia Data Collection • 42 intersection turning movement counts – 20 Queue Counts • 7 corridor travel time runs 1.Dulles Toll Road 2.Sunrise Valley Drive 3.Sunset Hills Road 4.Centreville Road 5.Fairfax County Parkway 6.Reston Parkway 7.Wiehle Ave Department of Transportation 9
  10. 10. County of Fairfax, Virginia Department of Transportation 10 Data Collection: Counts
  11. 11. County of Fairfax, Virginia Department of Transportation 11 Data Collection: Travel Time Runs
  12. 12. 12 Level of Service (LOS) Delay (s/veh) LOS Signalized Intersections Unsignalized Intersections A ≤ 10 ≤ 10 B > 10 - 20 10 - 15 C > 20 - 35 15 - 25 D > 35 - 55 25 - 35 E > 55 - 80 35 - 50 F > 80 ≥50 • LOS measures peak hour delay at an intersection or how well traffic moves along a roadway. LOS is generally defined in terms of speed and travel time, freedom to maneuver, safety, and traffic interruptions. • LOS E is considered acceptable for the Reston Network Analysis
  13. 13. County of Fairfax, Virginia Existing Level of Service 42 Critical Intersections with 310 movements • AM Peak – Two intersections at LOS E – 41 Movements operate at LOS F (13%) Department of Transportation 13 • PM Peak – Five intersections at LOS E – One intersection at LOS F – 70 movements operate at LOS F (22%)
  14. 14. County of Fairfax, Virginia Department of Transportation 14 Existing Intersection LOS
  15. 15. County of Fairfax, Virginia Department of Transportation 15 Existing Intersection LOS (Cont’d)
  16. 16. County of Fairfax, Virginia Department of Transportation 16 Existing Intersection LOS (Cont’d)
  17. 17. County of Fairfax, Virginia Existing Wiehle-Reston East Walkshed Department of Transportation 17
  18. 18. County of Fairfax, Virginia Existing Reston Town Center Walkshed Department of Transportation 18
  19. 19. County of Fairfax, Virginia Existing Herndon Walkshed Department of Transportation 19
  20. 20. County of Fairfax, Virginia Existing Reston TSA Walk-shed Department of Transportation 20
  21. 21. County of Fairfax, Virginia Existing Bike Facilities Department of Transportation 21
  22. 22. County of Fairfax, Virginia Planned Bike Facilities Department of Transportation 22
  23. 23. County of Fairfax, Virginia Existing Bus Routes • Buses oriented toward serving the Wiehle Reston-East Metrorail Station • 5 existing RIBS Routes serving internal Reston Trips • 28 total bus routes in Reston and Herndon Department of Transportation 23
  24. 24. County of Fairfax, Virginia Department of Transportation 24 Existing Bus Routes (Cont’d)
  25. 25. County of Fairfax, Virginia Department of Transportation 25 2050 Conditions • Test Build out of the Reston Phase I Comprehensive Plan Land Use • Assume build out of roadway improvements • Assume complete grid of streets • Account for vehicle trip reductions due to improved bike/pedestrian and transit connections in the TSAs
  26. 26. County of Fairfax, Virginia Inputs into Modeling Process • MWCOG / Fairfax County Models • GIS Layers: Traffic Analysis Zones; Parcels; Aerial Imagery • Land use by Transportation Analysis Zone (TAZ) - Parcels • Traffic Counts: Freeways & Arterials • Other Available Traffic Counts • Traffic Signal Timings • SYNCHRO for Signal Optimization Department of Transportation 26
  27. 27. County of Fairfax, Virginia Department of Transportation 27 Development Peak Hour – Future Trips 0-1/4 Mile ¼ to ½ Mile Beyond ½ Mile 2030 2050 2030 2050 2030 2050 Office 40% 45% 35% 40% 30% 35% Residential 40% 45% 35% 40% 20% 25% Technological Advancement for all Trips - 7.5% - 7.5% - 7.5% TDM Vehicle Trip Reduction Goals Reductions based off of ITE Trip Generation Rates
  28. 28. County of Fairfax, Virginia Department of Transportation 28 Next Steps • Test 2050 Comp Plan Build Out • Mitigation Measures - Tiered Approach • No right of way impact – Trip Re-assignment – Optimize Signal Timing and Phasing – Modify the Lane Configuration – Evaluate 4-way Stop vs. 2-way Stop – Traffic Signal Addition • Some right of way impact – Turn lanes – Additional through lane – Additional grid link • Large scale mitigations if needed – Discussion with Advisory Group and Stakeholders Group
  29. 29. County of Fairfax, Virginia Department of Transportation 29 Next Steps (Cont’d) • DRPT Guidelines Roadway Classification • Phasing Analysis • Reston Comprehensive Plan Amendment • If needed to integrate finalized grid of streets • Four Specific Study Locations • Reston Parkway • Fairfax County Parkway at Spring Street • Fairfax County Parkway at Sunrise Valley Drive • Rock Hill Bridge
  30. 30. County of Fairfax, Virginia Questions & Comments Department of Transportation 30 For questions and comments about the study please contact: Kristin Calkins: Kristin.Calkins@fairfaxcounty.gov (703) 877-5710

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