reston network analysis community meeting 2050 results and funding plan: nov. 7, 2016

County of Fairfax, Virginia

Reston Network AnalysisCommunity Meeting

2050 Results & Funding Plan

November 7, 2016

Kristin CalkinsFairfax County Department of Transportation


Agenda• Purpose of the Study• Network Analysis Process• 2050 Results• Next Steps• Question & Answer

Department of Transportation 2


Purpose of Study• Conduct a detailed analysis of the grid of streets and

determine– A finalized grid of streets– Number of lanes between and at intersections– How to best accommodate transit, bikes, and pedestrians– Right-of-way needs

• Assign urban street types and modal emphasis based on the Urban Street Standards from the Department of Rail and Public Transportation

• Conduct a phasing analysis of when larger projects are needed




Study Area


How we got here:Reston Phase I Plan Amendment



Need for Study


The Reston Master Plan Special Study was a two-phase planning study to identify changes to the Fairfax County Comprehensive Plan to help guide future development in the planned community of Reston and adjoining areas located along the Dulles Airport Access and Toll Road.

• The study began in 2009 and concluded in June 2015 after robust and thoughtful community discussions and participation.

• The task force was comprised of 25 primary members that included residents and representatives from Reston communities, developments, and County staff.

• The Board follow-on motion from the adoption directed staff to: – “conduct a detailed evaluation and operational analysis of the enhanced street

network shown on the Reston Master Plan, prioritize these improvements, and develop an implementation strategy.”

http://www.fairfaxcounty.gov/dpz/comprehensiveplan/


Need for Study (Cont.)Follow-on Study to the Reston Phase I Plan Amendment



Reston Phase I Plan AmendmentTransportation Recommendations


• Maintain a balance between land use and transportation• Ensure pedestrian mobility throughout the TSAs• Bike Master Plan for County has been adopted and

includes the TSAs• An enhanced RIBS and Fairfax Connector service to

support rail• Strong Transportation Demand Management (TDM)

program in the TSAs


Reston Phase I Plan AmendmentMajor Road Transportation Recommendations


• An enhanced street network to increase connectivity– Developed by the Reston Task

Force• Soapstone Drive Overpass• Town Center Parkway

Underpass • South Lakes Drive Overpass• Grade Separate Fairfax

County Parkway/Sunrise Valley Drive



Reston Phase I Plan AmendmentGrid of Streets


Reston Network Analysis


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• Prioritizatio

n of larger projects

Network Analysis Project Process

Advisory Group input, Stakeholder input, Community input


Transit Oriented Development• Mixed-use walkable

development around Metrorail stations

• Supported by strong Transportation Demand Management (TDM) program• Enhanced pedestrian facilities• Increased transit ridership• More bike parking and access• Encourages carpooling• Teleworking


Development2050 Peak Hour – Future Trips0 to ¼ Mile

¼ to ½ Mile

Beyond ½ Mile

Office 45% 40% 35%

Residential 45% 40% 25%Technological Advancement

7.5% 7.5% 7.5%

TDM Vehicle Trip Reduction Goals

Reductions are from ITE Trip Generation Rates


Evaluating the Grid• Level of Service and Delay at Intersections

• LOS E (55 – 80 seconds of delay) or better is the standard for the Reston Transit Station Areas agreed to by VDOT and FCDOT

• Queue Length (number of cars waiting at a signal)• Walksheds – pedestrian accessibility• Enhanced connectivity for transit



Achieving LOS E: 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)• Mitigation will be the way to achieve LOS E or better

in the Transit Station Areas• Using mitigation measures that have the lowest

impact



Mitigation



Mitigation Options• Mitigation Measures - Tiered Approach

– 1st Tier: No right of way (ROW) impact – 2nd Tier: Limited right of way impact– 3rd Tier: Large scale mitigations if needed

– Consultation with Advisory Group, Stakeholders, and citizens on all Tier 3 measures

• Each grid link is initially assumed to be one lane in each direction

– No turn lanes were initially assumed at new intersections


Additional coordination will be needed with VDOT on the location of turn lanes at signalized intersections

Reston Station Boulevard

N/S

Grid

Lin

k


2050 Mitigation Measures• Tier 1 (no ROW impacts)

– Modifications to lane configurations– Signal timing and phasing optimization – All-way stop vs. two-way stop evaluation – Additional traffic signals

• Tier 2 (limited ROW impacts– Turn lanes: left and right turn lanes– Additional through lane(s)– Additional grid link(s)



2050 Intersection Control



Problem Locations


• Problem Locations were identified to help track the progress of mitigation measures

• 120 seconds of delay was used to identify a problem location

– LOS E is 80 seconds and 120 seconds represents 50% more delay than what is acceptable in the Reston TSAs.

• Problem locations help staff understand where more effort would be needed to mitigate the transportation issues.



2050 Unmitigated Problem Locations


2050 Problem Locations


Intersections – 120+ Seconds of Delay

Intersections2050 Unmitigated After 2050

1st TierAfter 2050

2nd Tier20 10 7

With signal re-timings, new signals, and new turn lanes there was a reduction in the

projected number of intersections with delays in excess of 120 seconds

After Tier 2: 7 Problem Locations 1 was 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


Network Analysis Follow-On Tasks

Fairfax County Pkwy. & Spring St.

Reston Pkwy. Capacity Improvements

Fairfax County Pkwy. & Sunrise Valley Dr.

23

Graphic from Reston Network Analysis Scope


2050 3rd Tier Recommendations



Tier 3 Alternatives Analysis• Proposed 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



Reston Parkway: Proposed Lawyers Road Connection


Remove Left Turn Bays

New Intersection

xx

Realigned Road


Fairfax County Parkway: Proposed Fairbrook Drive Ramp



Fairfax County ParkwayProposed Single Point Urban Interchange


Baron Cameron & Fairfax County Parkway



2050 Unmitigated Problem Locations



2050 1st Tier Problem Locations



2050 2nd Tier Problem Locations


2050 3rd Tier Problem Locations

32


2050 Problem Locations


Intersections – 120+ Seconds of Delay

Intersections2050

UnmitigatedAfter 2050

1st TierAfter 2050

2nd TierAfter 2050

3rd Tier20 10 7 1*

With Tier 3 mitigations a significant reduction in the projected number of intersections

experiencing delays in excess of 120 seconds can be seen.

*Centreville Road & Sunrise Valley Drive: PM 138 seconds in Innovation TSA.• The intersection was included in the analysis of the Innovation TSA,

there is ongoing evaluation of the improvements at this loation.


Tier 3 LOS F Intersections• Problem Locations were identified to help track

the progress of mitigation measures• LOS E (55 – 80 seconds of delay) or better is the

standard for the Reston Transit Station Areas agreed to by VDOT and FCDOT

• Goal of study is to have no intersections operating at LOS F

• Key intersections, where major roads intersect, were used to identify LOS F intersections

34


Tier 3 LOS ResultsOf the 42 key signalized intersections on the major roadways

in the Reston TSA, only 5 continue to have 80 seconds of delay or greater after Tier 3 Mitigation.

42 Key Intersections – LOS F

Peak Hour 2050 Unmitigated

After2050 1st Tier

After2050 2nd Tier

After2050 3rd Tier

Total 24 11 9 5

35


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

– 95 seconds in AM • Reston Parkway at Sunset Hills Road

– 83 seconds of delay in the PM• Centreville Road at Sunrise Valley Drive

– Innovation TSA

36


Next Steps• 2050 Phasing Analysis of major projects• 2050 detailed analysis of the Dulles Toll Road• 2030 interim analysis of network• Classification of grid links using DRPT Urban Street

Guidelines



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

11/7/16


Questions & Comments

For questions and comments about the study please contact:

Kristin Calkins: [email protected](703) 877-5710

http://www.fairfaxcounty.gov/fcdot/restonnetworkanalysis/


reston network analysis community meeting 2050 results and funding plan: nov. 7, 2016

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