Reston Network Analysis: 2050 1st Tier Mitigation Results
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Transcript of Reston Network Analysis: 2050 1st Tier Mitigation Results
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County of Fairfax, Virginia
Reston Network Analysis2050 1st Tier Mitigation Results
February 19, 2016Stakeholders Group
Kristin CalkinsFairfax County Department of Transportation
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County of Fairfax, Virginia
Agenda
• Study Purpose• Project Progress Overview• 2050 1st Tier Mitigation Results• Mitigation Options• Next Steps• Questions and Answers
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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
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County of Fairfax, Virginia
Reston Network Analysis Tasks1. Data Collection – done2. Existing Conditions – done3. Future Conditions – 2050 mitigation underway
– Determine Grid of Streets
4. Phasing Analysis 5. DRPT Classifications6. Specific Location Improvements For Additional Study
– Reston Parkway– Sunrise Valley Drive @ Fairfax County Parkway– Spring Street @ Fairfax County Parkway– Rock Hill Bridge
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Data Collectio
n• Traffic
Counts in
June 2015
• Travel Time Runs
Existing Conditi
ons• Cap
acity Analysis
• Level of
Service
Test Grid of
Streets (2030 &
2050)• Traffic
Forecasting Capac
ity Analy
sis • Level
of Servic
e
Mitigation
• Signal re-
timing• New
links• Turn
lanes• Additi
onal lanes
Roadway Classifica
tion• DRPT
Design
Guidelines• B
ike lanes
• Sidewalks/ Pedestrian routes
• On-Street Parking
• Transit Routes
Finalize Grid of Streets (2030 & 2050)
Based on:• Advis
ory Group input
• Stakeholde
r input
• Communit
y input
Phasing Analysis• Priori
tization of
larger projec
ts
Network Analysis Project Process
Advisory Group input, Stakeholder input, Community input
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County of Fairfax, Virginia
Reston VISUM Model
Tysons
Reston
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County of Fairfax, Virginia
Mitigation
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County of Fairfax, Virginia
Purpose of Mitigation• Mitigation reduces vehicle congestion • Mitigation reduces delays experienced at
intersections• Mitigation improves the reliability of travel times
through an area (for both buses and vehicles)
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County of Fairfax, Virginia
Mitigation Options• Mitigation Measures - Tiered Approach
– 1st Tier: No right of way (ROW) impact – 2nd Tier: Some right of way impact– 3rd Tier: Large scale mitigations if needed
– Consultation with Advisory Group and Stakeholders
• Each grid link is initially assumed to be one lane in each direction
– No turn lanes at new intersections
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County of Fairfax, Virginia
2050 1st Tier Mitigation Measures
• No ROW Impact Mitigation Measures – Modifications to lane configurations– Signal timing and phasing optimization – All-way stop vs. two-way stop evaluation – Additional traffic signals
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County of Fairfax, Virginia
Mitigation Measures1st Tier: No Right of Way Impact
•Intersection Reconfiguration– Optimized signal timing and phasing– Lane configuration modification
Westwood Center Dr. @ Route 7 (2013) Westwood Center Dr. @ Route 7 (2015)
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County of Fairfax, Virginia
Mitigation Measures (Cont.)1st Tier: No Right of Way Impact
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•Existing and Potential Future Signals– Adding/removing traffic signals– Adding/modifying stop control– Modifying Parking
Westwood Center Dr. @ Sheraton Tysons Dr. (2015)
Westwood Center Dr. @ Sheraton Tysons Dr. (2013)
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County of Fairfax, Virginia
2050 1st Tier Recommendations
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County of Fairfax, Virginia
2050 1st Tier Intersection Control
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Existing Signal
Signal Proposed by different study
Signal Proposed
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County of Fairfax, Virginia
2050 1st Tier Intersection Control (Cont.)
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Existing Signal
Signal Proposed by different study
Signal Proposed
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County of Fairfax, Virginia
2050 1st Tier Signal Recommendations
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New Signalized Intersection LocationsSunrise Valley Dr. @ Wood Oak Dr. Sunrise Valley Dr. @ Commerce Park Dr. East
Sunrise Valley Dr. @ Colts Brook Dr. Soapstone Overpass @ Indian Ridge Rd. Extension
Frying Pan Rd. @ Greg Roy Ln. Sunset Hills Rd. @ West of Town Center Pkwy.
Monroe St. @ Future Connection to Herndon Metro Town Center Pkwy. @ North of Sunset Hills
Glade Dr. @ Pinecrest Rd. Town Center Pkwy. @ Market St.
South Lakes Dr. @ Pinecrest Rd. Sunset Hills Rd. @ Library St.
Sunrise Valley Dr. @ Pinecrest Rd. Extended Sunset Hills Rd. @ Soapstone Overpass
Sunrise Valley Dr. @ Town Center Pkwy. Sunset Hills Rd. @ East of Soapstone Overpass
Town Center Pkwy. @ North of Sunrise Valley Dr. Sunset Hills Rd. @ South Lakes Overpass
West of Reston Pkwy. with grid street Reston Station Blvd. @ Metro Center Dr.
Sunrise Valley Dr. @ Roland Clarke Place Reston Station Blvd. @ Michael Faraday Dr.
Sunrise Valley Dr. @ Indian Ridge Rd. Isaac Newton Square S. @ Isaac Newton Square W.
Sunrise Valley Dr. @ Commerce Park Dr. West Wiehle Ave. @ Isaac Newton Square N.
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County of Fairfax, Virginia
Lane Re-allocationSunrise Valley Drive @ Preston White Drive / S Lake Drive
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2050 Unmitigated 2050 1st Tier Mitigation
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County of Fairfax, Virginia
2050 1st Tier MitigationResults
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County of Fairfax, Virginia
2050 1st Tier Mitigation Results• Stop Controlled Intersections:
– Overall LOS– Overall delay
• Signalized Intersections:– Overall LOS– Overall delay– LOS by movement– Delay by movement– Volumes for each movement
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County of Fairfax, Virginia
1st Tier LOS Results• LOS E is the standard for the Reston Transit
Station Areas• Of 42 key signalized intersections in the study area,
the following are forecast operate at Level of Service F:
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42 Key Intersections – LOS F 2050 Unmitigated 2050 1st Tier
AM Peak Hour 24 11
PM Peak Hour 26 11
AM & PM Peak Hour 22 9
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County of Fairfax, Virginia
2050 Unmitigated Peak Hour LOS (Page 1)
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County of Fairfax, Virginia
2050 1st Tier Peak Hour LOS (Page 1)
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County of Fairfax, Virginia
2050 Unmitigated Peak Hour LOS (Page 2)
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County of Fairfax, Virginia
2050 1st Tier Peak Hour LOS (Page 2)
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County of Fairfax, Virginia
2050 Unmitigated Peak Hour LOS (Page 3)
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County of Fairfax, Virginia
2050 1st Tier Peak Hour LOS (Page 3)
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County of Fairfax, Virginia
2050 Problem Locations
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Intersections – 120+ Seconds of Delay
Peak Hour 2050 Unmitigated
2050 1st Tier Mitigation
AM 17 12
PM 19 7
AM & PM 14 5
With signal re-timings and the introduction of signals there has been a reduction in the number of intersections experiencing delays
in excess of 120 seconds
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County of Fairfax, Virginia
2050 Unmitigated Problem Locations
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County of Fairfax, Virginia
2050 1st Tier Problem Locations
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County of Fairfax, Virginia
2050 Unmitigated Problem Locations (cont.)
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County of Fairfax, Virginia
2050 1st Tier Problem Locations (cont.)
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County of Fairfax, Virginia
2050 Unmitigated Problem Locations (cont.)
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County of Fairfax, Virginia
2050 Mitigated Problem Locations (cont.)
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County of Fairfax, Virginia
2050 1st Tier Problem Locations
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• 2050 Unmitigated had 22 Problem Locations• Intersections with Delay over 120 Seconds
1. Frying Pan Road & Sunrise Valley Drive2. Frying Pan Road & Centreville Road 3. Centreville Road & Coppermine Road 4. Centreville Road & Sunrise Valley Drive 5. Monroe Street & Fox Mill Road 6. Spring Street & Herndon Parkway 7. Fairfax County Parkway & Baron Cameron Avenue 8. Fairfax County Parkway & Sunrise Valley Drive9. Town Center Parkway & Sunset Hills Road10. Reston Parkway & Baron Cameron Avenue11. Reston Parkway & Bowman Towne Drive12. Reston Parkway & Sunrise Valley Drive 13. Reston Parkway & South Lakes Drive
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County of Fairfax, Virginia
2050 1st Tier Available Data
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County of Fairfax, Virginia
2050 AM Peak Hour - Unmitigated
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County of Fairfax, Virginia
2050 AM Peak Hour – 1st Tier
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County of Fairfax, Virginia
2050 AM Peak Hour: Unmitigated vs. 1st Tier
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County of Fairfax, Virginia
2050 PM Peak Hour - Unmitigated
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County of Fairfax, Virginia
2050 PM Peak Hour – 1st Tier
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County of Fairfax, Virginia
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2050 PM Peak Hour: Unmitigated vs. 1st Tier
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County of Fairfax, Virginia
AM Peak Hour Site Trips and Link Volumes
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County of Fairfax, Virginia
PM Peak Hour Site Trips and Link Volumes
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County of Fairfax, Virginia
Future Mitigation
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County of Fairfax, Virginia
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Mitigation Measures2nd Tier: Some Right of Way Impact
• Turn lanes– New Left and Right turn lanes– Extended turn lanes: adds storage
• Additional through lane• Additional grid link
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County of Fairfax, Virginia
Mitigation Measures3rd Tier: Alternative Intersection Treatment
• Median U-Turn/Superstreet– Eliminates left turn movement for side streets– Increases thru movement green time– Additional needed ROW to provide turn radius
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County of Fairfax, Virginia
Mitigation Measures3rd Tier: Large Mitigation Measures
• Underpass/Overpass– Provides for an uninterrupted thru movement
• Only done in close coordination with Advisory Group and Stakeholders after all other mitigation measures have not worked
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County of Fairfax, Virginia
Next Steps• Apply ROW impact Mitigation Measures
– Turn lanes– Turn lane extensions– Additional thru lane
• Develop possible mitigation measures for problem locations that remain to discuss with Advisory Group
• Meet with Advisory Group on possible 2nd Tier mitigation measures
• Meet with Stakeholder group on 2nd Tier
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County of Fairfax, Virginia
Schedule
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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
2/19/16
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County of Fairfax, Virginia
Questions & Comments
For questions and comments about the study please contact:
Kristin Calkins: [email protected](703) 877-5710
http://www.fairfaxcounty.gov/fcdot/restonnetworkanalysis/
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