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Hunter Mill Road and Sunset Hills Road Study: Community Meeting #5 - Sept. 15, 2016

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Hunter Mill Road and Sunset Hills Road Study: Community Meeting #5 - Sept. 15, 2016

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Hunter Mill Road and Sunset Hills Road Study: Community Meeting #5 - Sept. 15, 2016

  1. 1. Hunter Mill Road and Sunset Hills Road Study Community Meeting #5 Progress Update September 15, 2016 Kristin Calkins Fairfax County Department of Transportation
  2. 2. Presentation Agenda • Project Objectives • Summary of Prior Community Involvement • Review of Alternatives Considered • Traffic Analysis Results • Detailed Evaluation of a 5-leg Roundabout • Evaluation of Sunset Hills Road Relocation • Next Steps • Questions and Answers 2
  3. 3. Project Objectives • Address existing congestion • Plan for future traffic • Address queuing along Hunter Mill Road and Sunset Hills Road • Improve access to the Dulles Toll Road by minimizing congestion • Maintain Hunter Mill Road’s character by applying context sensitive solutions 3
  4. 4. Project Study Area 4 Intersection ID Intersection Current Intersection Control Type 1 Hunter Mill Road at Sunrise Valley Drive Signalized 2 Hunter Mill Road at DTR EB Ramps Signalized 3 Hunter Mill Road at DTR WB Ramps Signalized 4 Hunter Mill Road at Sunset Hills Road Signalized 5 Hunter Mill Road at Crowell Road Unsignalized (All-Way Stop) 6 Hunter Mill Road at Hunting Crest Lane Unsignalized (Two-Way Stop) 7 Hunter Mill Road at Lake Fairfax Park Unsignalized (Two-Way Stop) 7 6 5 43 2 1
  5. 5. Project Background • Board of Supervisors authorized study as a follow-on study to the Reston Phase I Plan Amendment • Meetings held on: • December 8, 2014: Kick-Off • February 24, 2015: Existing & No-Build conditions and community input on alternatives • May 20, 2015: Analysis Findings • July 2015: Project put on hold at request of community to allow for new capacity analysis methodologies for roundabouts to be adopted by the Transportation Research Board • Meeting held on: June 30, 2016: Roundabout capacity results 5
  6. 6. Project Process 24 MONTHS 6 We are Here
  7. 7. Summary of Community Comments • Concern that traffic from Wiehle Avenue may be diverted to Hunter Mill Road • Concern that the signal at Crowell Road may increase delays in the off-peak • Maintain the character of Hunter Mill Road • Main goal of study is to improve Level of Service (LOS) on Hunter Mill Road 7
  8. 8. Summary of Community Comments (Cont.) • Roundabouts preferred at Dulles Toll Road ramps • Widen Hunter Mill Road from eastbound Dulles Toll Road to Sunrise Valley Drive • Concern that improvements may attract more development • Community wants an in-depth review of roundabouts • There should be a mix and match of alternatives 8
  9. 9. Alternatives Considered 9 Crowell Road Sunset Hills Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR No-Build Crowell Road Sunset Hills Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR Alt. 1A Crowell Road Sunset Hills Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR Alt. 1B Roundabout Signal Proffered
  10. 10. Alternatives Considered (Cont.) 10 Crowell Road Sunset Hills Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR No-Build Crowell Road Sunset Hills Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR Alt. 2 Crowell Road Sunset Hills Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR Alt. 3 Signal Proffered
  11. 11. Alternatives Considered (Cont.) 11 Crowell Road Sunset Hills Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR No-Build Crowell Road Sunset Hills Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR Alt. 4A Crowell Road Sunset Hills Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR Alt. 4B Signal Proffered
  12. 12. Traffic Analysis Results Traffic Analysis: • Performed for both 2030 and 2050 • Consistent with VDOT Policies and Procedures • Used new Roundabout Methodology 12
  13. 13. New Roundabout Methodology • New research resulted in: • Re-assessment of Roundabout Capacity Models for the Highway Capacity Manual • New methodology (adopted January 2016) resulted in an approximate 10-12% increase in roundabout capacity • New model prioritizes movements with higher volumes • Resulting in improved LOS for heavier movements and overall LOS • This study is an operational assessment, not an engineering design. Roundabouts generally have greater ROW impacts • The best operating roundabout might have a tradeoff of a larger ROW footprint 13
  14. 14. 2030 Traffic Analysis • Utilized Future Year Projections from the Reston Phase I Plan Amendment. • Included development potential associated with development of the Reston Transit Station Areas. 14
  15. 15. 2030 Traffic Analysis Results 15 Crowell Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR No-Build Crowell Road Sunset Hills Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR Alt. 1A (Roundabouts) Crowell Road Sunrise Valley Drive HunterMillRoad WB DTR EB DTR Alt. 1B (Roundabouts) Signal Proffered C C D D C E C C D D E C D D B B C D C D B B B D C B LOS: A, B, C LOS: D LOS: E LOS: F AM/PM LOS Key for Levels of Service Sunset Hills Road Sunset Hills Road 24 sec./26 sec. 41 sec./53 sec. 29 sec./73 sec. 30 sec./25 sec. 38 sec./48 sec. 37 sec./18 sec. 45 sec./49 sec. 29 sec./47 sec. 17 sec./17 sec. 23 sec./12 sec. 14 sec./42 sec. 29 sec./47 sec. 17 sec./17 sec.
  16. 16. 2030 Traffic Analysis Results 16 Crowell Road Sunrise Valley Drive WB DTR EB DTR No-Build Crowell Road Sunset Hills Road Sunrise Valley Drive WB DTR EB DTR Alt. 2 (Signals) Crowell Road Sunrise Valley Drive WB DTR EB DTR Alt. 3 (Signals) Signal Proffered C C D D C E C C D D C C C D C C D D D C D C D D C D Sunset Hills Road Sunset Hills RoadHunterMillRoad HunterMillRoad HunterMillRoad LOS: A, B, C LOS: D LOS: E LOS: F AM/PM LOS Key for Levels of Service 22 sec./27 sec. 21 sec./45 sec. 55 sec./37 sec. 33 sec./31 sec. 39 sec./44 sec. 42 sec./34 sec. 19 sec./41 sec. 36 sec./35 sec. 35 sec./44 sec. 24 sec./26 sec. 41 sec./ 53 sec. 29 sec./73 sec. 30 sec./25 sec. 38 sec./48 sec. B D
  17. 17. 2030 Traffic Analysis Results 17 Crowell Road Sunrise Valley Drive WB DTR EB DTR No-Build Crowell Road Sunset Hills Road Sunrise Valley Drive WB DTR EB DTR Alt. 4A (Roundabouts at Ramps) Crowell Road Sunrise Valley Drive WB DTR EB DTR Alt. 4B (Signals at Ramps) Signal Proffered C C D D C E C C D D C C D D B B F F E C D C C B C D Sunset Hills Road Sunset Hills RoadHunterMillRoad HunterMillRoad HunterMillRoad LOS: A, B, C LOS: D LOS: E LOS: F AM/PM LOS Key for Levels of Service 29 sec./47 sec. 45 sec./50 sec. 123 sec./143 sec. 29 sec./27 sec. 17 sec./17 sec. 23 sec./12 sec. 39 sec./32 sec. 66 sec./27 sec. 24 sec./26 sec. 41 sec./ 53 sec. 29 sec./73 sec. 30 sec./25 sec. 38 sec./48 sec.
  18. 18. 2030 Traffic Analysis Summary 18 LOS Standard = LOS D * Alt 2 in new location ** No Build includes the proffered signal at Crowell Road Intersection Roundabouts Signals Mix & Match No Build Alt. 1A Alt. 1B Alt. 2 Alt. 3 Alt. 4A Alt. 4B OVERALL LOS AM (PM) Hunter Mill Rd. @ Crowell Rd. / Sunset Hills Rd. - - C (B) - D (C) - C (B) Hunter Mill Rd. @ Crowell Rd.** C (C) E (C) - C (C) - C (C) - Hunter Mill Rd. @ Sunset Hills Rd.* D (D) - - D (D) - - - Hunter Mill Rd. @ DTR WB Ramps & Sunset Hills Rd. - D (D) - - - D (D) - Hunter Mill Rd. @ DTR WB Ramps C (E) - B (D) C (D) B (D) - D (C) Hunter Mill Rd. @ DTR EB Ramps C (C) B (B) B (B) C (C) D (C) B (B) E (C) Hunter Mill Rd. @ Sunrise Valley Dr. D (D) C (D) C (D) D (D) C (D) F (F) C (D)
  19. 19. 2050 Traffic Analysis Results 19 Crowell Road Sunrise Valley Drive WB DTR EB DTR No-Build Crowell Road Sunset Hills Road Sunrise Valley Drive WB DTR EB DTR Crowell Road Sunrise Valley Drive WB DTR EB DTR Signal Proffered B C C B D C E C E D F F F F D B C C F B D B D B D B Sunset Hills Road Sunset Hills RoadHunterMillRoad HunterMillRoad HunterMillRoad LOS: A, B, C LOS: D LOS: E LOS: F AM/PM LOS Key for Levels of Service 50 sec./14 sec. 137 sec./58 sec. 82 sec./82 sec. 37 sec./13 sec. 104 sec./14 sec. 26 sec./35 sec. 37 sec./13 sec. 50 sec./14 sec. 17 sec./23 sec. 25 sec./17 sec. 42 sec./32 sec. 60 sec./21 sec. 58 sec./48 sec. Alt. 1A (Roundabouts) Alt. 1B (Roundabouts)
  20. 20. 2050 Traffic Analysis Results 20 Crowell Road Sunrise Valley Drive WB DTR EB DTR No-Build Crowell Road Sunset Hills Road Sunrise Valley Drive WB DTR EB DTR Crowell Road Sunrise Valley Drive WB DTR EB DTR Signal Proffered B C C B D C E C E D C B D C E C C C F C E D E D E D E C Sunset Hills Road Sunset Hills RoadHunterMillRoad HunterMillRoad HunterMillRoad LOS: A, B, C LOS: D LOS: E LOS: F AM/PM LOS Key for Levels of Service 21 sec./14 sec. 71 sec./38 sec. 40 sec./29 sec. 58 sec./22 sec. 118 sec./24 sec. 34 sec./31 sec. 55 sec./22 sec. 59 sec./48 sec.57 sec./48 sec. 17 sec./23 sec. 25 sec./17 sec. 42 sec./32 sec. 60 sec./21 sec. 58 sec./48 sec. Alt. 2 (Signals) Alt. 3 (Signals)
  21. 21. 2050 Traffic Analysis Results 21 Crowell Road Sunset Hills Road Sunrise Valley Drive WB DTR EB DTR No-Build Crowell Road Sunset Hills Road Sunrise Valley Drive WB DTR EB DTR Crowell RoadSunset Hills Road Sunrise Valley Drive WB DTR EB DTR Signal Proffered B C C B D C E C E D C B F F D B D C F B F E E C D B HunterMillRoad HunterMillRoad HunterMillRoad LOS: A, B, C LOS: D LOS: E LOS: F AM/PM LOS Key for Levels of Service 117 sec./57 sec. 22 sec./20 sec. 82 sec./82 sec. 37 sec./13 sec. 104 sec./14 sec. 39 sec./32 sec. 66 sec./27 sec. 50 sec./14 sec. 60 sec./21 sec. 42 sec./32 sec. 25 sec./17 sec. 17 sec./23 sec. 58 sec./48 sec. Alt. 4A (Roundabouts at Ramps) Alt. 4B (Signals at Ramps)
  22. 22. 2050 Traffic Analysis Summary 22 Intersection Roundabouts Signals Mix & Match No Build Alt. 1A Alt. 1B Alt. 2 Alt. 3 Alt. 4A Alt. 4B OVERALL LOS AM (PM) Hunter Mill Rd. @ Crowell Rd. / Sunset Hills Rd. - - F (B) - F (C) - F (B) Hunter Mill Rd. @ Crowell Rd.** B (C) F (F) - C (B) - C (B) - Hunter Mill Rd. @ Sunset Hills Rd.* C (B) - - E (D) - - - Hunter Mill Rd. @ DTR WB Ramps & Sunset Hills Rd. - F (F) - - - F (F) - Hunter Mill Rd. @ DTR WB Ramps D (C) - C (C) D (C) C (C) - D (C) Hunter Mill Rd. @ DTR EB Ramps E (C) D (B) D (B) E (C) E (C) D (B) E (C) Hunter Mill Rd. @ Sunrise Valley Dr. E (D) D (B) D (B) E (D) E (D) F (E) D (B) LOS Standard = LOS D * Alt 2 in new location ** No Build includes the proffered signal at Crowell Road
  23. 23. 23 Detailed Evaluation of 5-leg Roundabout • Intersection at Hunter Mill Road, Dulles Toll Road (WB) and Sunset Hills Road • This evaluation is being done at the request of the community • Designed per VDOT and FHWA standards • Evaluated for safe speeds, turning radii and vehicle paths
  24. 24. 24 5-Leg Roundabout: Hunter Mill Defense League
  25. 25. 5-Leg Roundabout Summary: Hunter Mill Defense League • Design: – Utilized Bypass lanes to limit circle size – No impact on toll plaza • Concerns – Additional conflict points due to bypass lanes – Not designed to VDOT standards – Requires widening under the bridge 25
  26. 26. 26 5-Leg Roundabout: Elongated Oval
  27. 27. 5-Leg Roundabout Summary: Elongated Oval Elongated Oval • Design: – Minimized Impact on adjacent buildings – No impact on toll plaza • Concerns – High speeds in circle – Reduced sight distance across circle – VDOT unlikely to approve design 27
  28. 28. 28 5-Leg Roundabout: Tight Circle
  29. 29. 5-Leg Roundabout Summary: Tight Circle Tightest Circle • Design – Smallest total footprint allowable – Provides minimal change to existing facilities • Concerns – Impacts Dulles Toll Road Ramp Plazas – would require relocation – Considerable right-of-way impacts on the east side of Hunter Mill Road – Approach angles violate NCHRP 672 guidance • Would not be considered an allowable and constructible design 29
  30. 30. 30 5-Leg Roundabout: Feasible Design
  31. 31. 5-Leg Roundabout Summary:Feasible Design Feasible Design • Design is reflected in Alternatives 1A and 4A – Only alternative that meets all VDOT and NCHRP design criteria – Minimizes impact on toll plaza • Concerns – Impacts the Reston Presbyterian Church – Cultural and structural impacts associated with the design – Difficult Constructability 31
  32. 32. 32 5-Leg Roundabout: Alternatives 1A and 4A
  33. 33. 33 Sunset Hills Road Realignment • Purpose of Sunset Hills Road Realignment: – To create distance from the Dulles Toll Road – To improve intersection efficiency along Hunter Mill Road – Improve queuing conditions along Hunter Mill Road • Two potential alignments have been developed
  34. 34. 34 Realignment Option A
  35. 35. 35 Realignment Option B
  36. 36. Sunset Hills Realignment Summary • Option A – Most natural geometry – Longest natural queuing area at Hunter Mill Road – Most separation to the Dulles Toll Road – Closest alignment to Hunting Crest neighborhood • Option B – Utilizes more of the existing facility – Provides back access to parcels along Hunter Mill Road – Has unusual curvature on breakaway point from existing – Less queuing area along straightaway at Hunter Mill Road – Separates school and soccer field 36
  37. 37. 37 Next Steps • Evaluate Community Feedback • Review Analysis Results • Select a Preferred Alternative based on: • Community Feedback • Traffic Analysis • Impacts • Select the Best Performing, Least Impactful Alternative • Final Recommendations and Report • Public meeting to present preferred alternative • Thursday, November 17 (Location TBD)
  38. 38. 38 Question & Answers 30 Minutes Please limit yourself to one question so others have an opportunity to ask Kristin.Calkins@Fairfaxcounty.gov http://www.fairfaxcounty.gov/fcdot/huntermillstudy.htm

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