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Reston Network Analysis: Existing Conditions

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Reston Network Analysis: Existing Conditions

November 20, 2015

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Reston Network Analysis: Existing Conditions

  1. 1. County of Fairfax, Virginia Reston Network Analysis Existing Conditions November 20, 2015 Kristin Calkins Fairfax County Department of Transportation
  2. 2. County of Fairfax, Virginia Agenda • Project Overview • Overview of Modeling Process – Data Collection – Modeling Methodology – Analysis and Results • Existing Conditions • 2050 & 2030 Trip Reductions • 2050 Model Runs • Next Steps • Questions And Answers Department of Transportation 1
  3. 3. County of Fairfax, Virginia Reston Transportation Recommendations Improvements from Reston Phase I Plan Amendment • An Enhanced Street Network to increase connectivity • Three additional Toll Road Crossings – Town Center Parkway Underpass – Soapstone Drive Overpass – South Lakes Drive Overpass • Grade Separate Fairfax County Parkway/Sunrise Valley Drive Department of Transportation 2
  4. 4. County of Fairfax, Virginia Enhanced Street Network • Maintains a balance between land use and transportation • Provide alternate routes through the TSAs for all modes • Ensures pedestrian mobility & connectivity 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 Department of Transportation 3
  5. 5. County of Fairfax, Virginia Study Area Department of Transportation 4
  6. 6. County of Fairfax, Virginia Purpose of Study • Conduct a detailed analysis of the grid of streets to determine: – Signal Control – 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 5
  7. 7. 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 4. Phasing Analysis 5. DRPT Classifications 6. Specific location improvements for additional study – Reston Parkway – Sunrise Valley Drive @ Fairfax County Parkway – Spring Street @ Fairfax County Parkway – Rock Hill Road Bridge Department of Transportation 6
  8. 8. 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
  9. 9. County of Fairfax, Virginia Data Needs • Completed – Intersections Turning Movement Counts (TMCs) – Intersections for Queue Measurement – Speed Run Routes – Synchro input and output files – Driveway Locations – Future Grid of Street Plans • Future – Mitigation Plans Department of Transportation 8
  10. 10. County of Fairfax, Virginia Data Needs – 7 Speed Run Routes Department of Transportation 9
  11. 11. County of Fairfax, Virginia Data Needs – 40 TMC/20 Queue Lengths Department of Transportation
  12. 12. County of Fairfax, Virginia Data Needs – SYNCHRO Network Department of Transportation 11
  13. 13. County of Fairfax, Virginia Data Inputs to VISUM Model Process • MWCOG / Fairfax County Models • GIS Layers (Traffic Analysis Zones; Parcels; Aerial Imagery) • Traffic Counts (Freeways & Arterials) • Other Available Traffic Counts • Traffic Signal Timings • SYNCHRO for Signal Optimization Department of Transportation 12
  14. 14. County of Fairfax, Virginia Modeling Flowchart Base Condition MWCOG 2.3 Fairfax County TDM ( Reston Meso Model VISUM) Update Time VISSIM SYNCHRO GIS Slicing 30 min TAZ Disagg Department of Transportation 13
  15. 15. County of Fairfax, Virginia Modeling Flowchart Future Condition Update Time MWCOG 2.3 Fairfax County TDM ) Slicing 30 min TAZ Disagg ITE TG TOD credit Land Use ( Reston Meso Model VISUM) VISSIM SYNCHRO GIS Department of Transportation
  16. 16. County of Fairfax, Virginia Methodology • County Model – Seed trip tables • VISUM – Model development at mesoscopic (local roadway system & driveway ) level. • VISUM model input – Traffic volumes and O-D trip tables – SYNCHRO for signal timing optimization • VISUM model output – Seamlessly translated to the VISSIM simulation model at the microscopic (roadway intersection) level. • VISSIM model – DTR Only – Microscopic analyses – adds intersection and driveway level details Department of Transportation 15
  17. 17. County of Fairfax, Virginia Land Use & Transportation • Test transportation improvements needed to support the land use potential approved in the Reston Phase I Comprehensive Plan Department of Transportation 16
  18. 18. County of Fairfax, Virginia MWCOG Regional Model Tyson sReston Department of Transportation 17
  19. 19. County of Fairfax, Virginia Reston VISUM Model Tysons Reston Department of Transportation 18
  20. 20. County of Fairfax, Virginia TAZ Zonal Split – Block Level Department of Transportation 19
  21. 21. County of Fairfax, Virginia TAZ Zonal Split – Driveway Entrances Department of Transportation 20
  22. 22. County of Fairfax, Virginia Base Calibration Procedure Network Model Demand Matrix Assignment TFlowFuzzy Count Data VISSIM Department of Transportation 22
  23. 23. County of Fairfax, Virginia Calibration Parameter/Procedure • VISUM/VISSIM – Field Observed Volume – Field Observed Queue – Field Observed Corridor Travel Time • VISSIM (DTR only) – VDOT Traffic Operation Tool Guidebook – Formula – Number of Model Runs – Confidence Level – Tolerance Level Department of Transportation 23
  24. 24. County of Fairfax, Virginia Analysis and Results • Measure of Effectiveness (MOE) from VISSIM – Field Observed vs. Model Volume – Field Observed vs. Model Queue – Field Observed vs. Model Corridor Travel Time • Measure of Effectiveness (MOE) from VISUM – Network Wide R2 Value – Field Observed vs. Model Volume – Intersection LOS Department of Transportation 24
  25. 25. County of Fairfax, Virginia VISSIM Results Department of Transportation 25
  26. 26. County of Fairfax, Virginia Dulles Toll Road AM Mainline Volumes 0 2000 4000 6000 8000 7:00-8:00 6:00-9:00 WB DTR Mainline east of Route 28 split Field Vissim 0 5000 10000 15000 7:00-8:00 6:00-9:00 WB DTR Mainline east of Hunter Mill Road off ramp Field Vissim 0 5000 10000 15000 20000 7:00-8:00 6:00-9:00 EB DTR Mainline east of Route 28/Airport merge Field Vissim 0 5000 10000 15000 20000 25000 7:00-8:00 6:00-9:00 EB DTR Mainline east of Hunter Mill Road on ramp Field Vissim Department of Transportation 26
  27. 27. County of Fairfax, Virginia Dulles Toll Road Exit Ramp Queues 7:00 AM – 8:00 AM ID Westbound Exit Ramp VISSIM Volume Field Volume GEH VISSIM Max Queue Field Max Queue Ramp Length (ft) Vehicle s Feet Vehicle s Feet 2 Centreville Road & DTR WB ramps 703 700 0.1 12 298 15 375 1460 16 Fairfax County Parkway & WB DTR ramps 552 575 1.0 7 167 6 150 1315 27 Reston Parkway & WB DTR ramps 717 815 3.5 8 190 7 175 1700 36 Wiehle Avenue & WB DTR ramps 312 405 4.9 8 195 9 225 1175 40 Hunter Mill Road & WB DTR ramps 354 360 0.3 11 251 8 200 1520 ID Eastbound Exit Ramp VISSIM Volume Field Volume GEH VISSIM Max Queue Field Max Queue Ramp Length (ft) Vehicle s Feet Vehicle s Feet 3 Centreville Road & DTR EB ramps 397 450 2.6 12 282 11 275 1515 17 Fairfax County Parkway & EB DTR ramps 919 875 1.5 22 539 9 225 1230 28 Reston Parkway & EB DTR ramps 521 540 0.8 10 240 5 125 1160 37 Wiehle Avenue & EB DTR ramps 680 535 5.9 14 332 17 425 850 41 Hunter Mill Road & EB DTR ramps 355 360 0.3 15 352 5 125 975 Department of Transportation 27
  28. 28. County of Fairfax, Virginia Dulles Toll Road AM Travel Times Direction Field VISSIM Difference Westbound 06:33 05:44 -00:49 Eastbound 08:32 08:30 00:03 Centreville Road – Hunter Mill Road Department of Transportation 28
  29. 29. County of Fairfax, Virginia Dulles Toll Road AM Animation Department of Transportation 29
  30. 30. County of Fairfax, Virginia Dulles Toll Road PM Mainline Volumes 0 5000 10000 15000 20000 17:00-18:00 16:00-19:00 WB DTR Mainline east of Route 28 split Field Vissim 0 5000 10000 15000 20000 25000 17:00-18:00 16:00-19:00 WB DTR Mainline east of Hunter Mill Road off ramp Field Vissim 0 2000 4000 6000 8000 10000 17:00-18:00 16:00-19:00 EB DTR Mainline east of Route 28/Airport merge Field Vissim 0 5000 10000 15000 17:00-18:00 16:00-19:00 EB DTR Mainline east of Hunter Mill Road on ramp Field Vissim Department of Transportation 30
  31. 31. County of Fairfax, Virginia Dulles Toll Road Exit Ramp Queues 5:00 PM – 6:00 PM ID Westbound Exit Ramp VISSIM Volume Field Volume GEH VISSIM Max Queue Field Max Queue Ramp Length (ft) Vehicle s Feet Vehicle s Feet 2 Centreville Road & DTR WB ramps 976 1055 2.5 29 721 16 400 1460 16 Fairfax County Parkway & WB DTR ramps 1172 1215 1.2 19 465 13 325 1315 27 Reston Parkway & WB DTR ramps 522 815 11.3 14 336 9 225 1700 36 Wiehle Avenue & WB DTR ramps 540 580 1.7 9 222 11 275 1175 40 Hunter Mill Road & WB DTR ramps 486 570 3.7 25 618 24 600 1520 ID Eastbound Exit Ramp VISSIM Volume Field Volume GEH VISSIM Max Queue Field Max Queue Ramp Length (ft) Vehicle s Feet Vehicle s Feet 3 Centreville Road & DTR EB ramps 228 310 5.0 9 222 12 300 1515 17 Fairfax County Parkway & EB DTR ramps 630 675 1.8 34 834 10 250 1230 28 Reston Parkway & EB DTR ramps 461 500 1.8 17 403 5 125 1160 37 Wiehle Avenue & EB DTR ramps 218 150 5.0 7 164 7 175 850 41 Hunter Mill Road & EB DTR ramps 342 430 4.5 23 563 6 150 975 Department of Transportation 31
  32. 32. County of Fairfax, Virginia Dulles Toll Road PM Travel Times Direction Field VISSIM Difference Westbound 07:00 7:24 00:24 Eastbound 05:26 05:49 00:23 Centreville Road – Hunter Mill Road Department of Transportation 32
  33. 33. County of Fairfax, Virginia Dulles Toll Road PM Animation Department of Transportation 33
  34. 34. County of Fairfax, Virginia VISUM Results Department of Transportation 34
  35. 35. County of Fairfax, Virginia Link Base Confidence Level AM Peak (7:00 – 8:00) Area-wide Department of Transportation 35
  36. 36. County of Fairfax, Virginia Link Base Confidence Level PM Peak (5:00 – 6:00) Area-wide Department of Transportation 36
  37. 37. County of Fairfax, Virginia Turning Movement Confidence Level AM Peak (7:00 – 8:00) Area-wide Department of Transportation 37
  38. 38. County of Fairfax, Virginia Turning Movement Confidence Level PM Peak (5:00 – 6:00) Area-wide Department of Transportation 38
  39. 39. County of Fairfax, Virginia 0 2000 4000 6000 8000 10000 12000 Field Count vs. Assigned Volumes EB DTR Mainline & Ramps (7:00 - 8:00 AM) Field Count (7:00-8:00 AM) Assignment Volumes (7:00-8:00 AM) Department of Transportation 39
  40. 40. County of Fairfax, Virginia 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Field Count vs. Assigned Volumes WB DTR Mainline & Ramps (5:00 - 6:00 PM) Field Count (5:00 - 6:00 PM) Assignment Volumes (5:00 - 6:00 PM) Department of Transportation 40
  41. 41. County of Fairfax, Virginia 0 500 1000 1500 2000 2500 3000 Fox Mill Road Sunrise Valley Drive South of DTR EB Ramps Between DTR Ramps North of DTR WB Ramps Ramp to Spring Street New Dominion Parkway Baron Cameron Avenue Field Count vs. Assigned Volumes NB Fairfax County Pkwy (7:00 - 8:00 AM) Field Count (7:00-8:00 AM) Assignment Volumes (7:00-8:00 AM) Department of Transportation 41
  42. 42. County of Fairfax, Virginia 0 500 1000 1500 2000 2500 3000 Baron Cameron Avenue New Dominion Parkway Ramp to Spring Street Fairfax County Pkwy SB - North of DTR WB Ramps Fairfax County Pkwy SB - between DTR Ramps Fairfax County Pkwy SB - South of DTR EB Ramps Sunrise Valley Drive Fox Mill Road Field Count vs. Assigned Volumes SB Fairfax County Pkwy (5:00 - 6:00 PM) Field Count (5:00 - 6:00 PM) Assignment Volumes (5:00 - 6:00 PM) Department of Transportation 42
  43. 43. County of Fairfax, Virginia 0 500 1000 1500 2000 2500 Field Count vs. Assigned Volumes NB Reston Pkwy (7:00 - 8:00 AM) Field Count (7:00-8:00 AM) Assignment Volumes (7:00-8:00 AM) Department of Transportation 43
  44. 44. County of Fairfax, Virginia 0 500 1000 1500 2000 2500 3000 3500 Field Count vs. Assigned Volumes SB Reston Pkwy (5:00 - 6:00 PM) Field Count (5:00 - 6:00 PM) Assignment Volumes (5:00 - 6:00 PM) Department of Transportation 44
  45. 45. County of Fairfax, Virginia Existing Conditions Department of Transportation 45
  46. 46. County of Fairfax, Virginia Existing Intersection LOS Individual Movements may have a lower Level of Service Department of Transportation 46
  47. 47. County of Fairfax, Virginia Existing Intersection LOS (Cont’d) Individual Movements may have a lower Level of Service Department of Transportation 47
  48. 48. County of Fairfax, Virginia Existing Intersection LOS (Cont’d) Individual Movements may have a lower Level of Service Department of Transportation 48
  49. 49. County of Fairfax, Virginia Existing Wiehle-Reston East Walkshed Department of Transportation 49
  50. 50. County of Fairfax, Virginia Existing Reston Town Center Walkshed Department of Transportation 50
  51. 51. County of Fairfax, Virginia Existing Herndon Walkshed Department of Transportation 51
  52. 52. County of Fairfax, Virginia Existing Reston TSA Walk-shed Department of Transportation 52
  53. 53. County of Fairfax, Virginia 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 Department of Transportation 53
  54. 54. County of Fairfax, Virginia Information Available at Request • 2030 Land use • 2050 Land use • 2050 Grid - # lanes • 2014 Trip Generation • 2030 Trip Generation • 2050 Trip Generation Department of Transportation 54
  55. 55. County of Fairfax, Virginia 2050 Model Runs • 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 Department of Transportation 55
  56. 56. County of Fairfax, Virginia Next Steps • 2030 Model Runs • 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 Department of Transportation 56
  57. 57. County of Fairfax, Virginia Schedule Department of Transportation 57 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) 3A1 Analyze Future Conditions (2030) 3B Simulation of the Dulles Toll Road 3C Microsimulation - Optional 4A Meetings/Presentations 5A Phasing Analysis - Existing Conditions 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 Feb-15May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 Dec-15 Jan-16 Sep-16 Oct-16Mar-16 Apr-16 May-16 Jun-16 Jul-16 Aug-16 11/17/15
  58. 58. County of Fairfax, Virginia Questions & Comments For questions and comments about the study please contact: Kristin Calkins: Kristin.Calkins@fairfaxcounty.gov (703) 877-5710 Department of Transportation 58

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