Reston Network Analysis: Community Meeting Tier 1 & Tier 2

County of Fairfax, Virginia
Reston Network Analysis
Community Meeting Tier 1 & Tier 2
May 18, 2016
Kristin Calkins
Fairfax County Department of Transportation

Agenda
• Purpose of the Study
• Network Analysis Process
• Tier 1 & Tier 2 Results
• Funding Update
• 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
3

4
Study Area

How we got here:
Reston Phase I Plan Amendment
5

Need for Study
6
• The Reston Phase I Comprehensive Plan Amendment was
adopted by the Fairfax County Board of Supervisors on
February 11, 2014.
• 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.”
– “conduct an inclusive process to prepare a funding plan for the
transportation improvements recommended in the Reston Master Plan
and report with its recommendations. The funding plan should include
arrangements for financing the public share of Reston infrastructure
improvements and facilitate co-operative funding agreements with the
private sector. The PC strongly believes that public and private
investment in Reston is both critical and responsible for ensuring
Reston’s future success”

Need for Study (Cont.)
Follow-on Study to the Reston Phase I Plan Amendment
7

Transportation Recommendations
8
• 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

Major Road Transportation Recommendations
9
• 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

Why a Grid
A grid of streets allows for more options when going from
point A to point B, reducing the demand on streets
10

11
Grid of Streets

Reston Network Analysis
12

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

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
14
Development
2050 Peak Hour – Future Trips
0 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 based off of ITE Trip Generation Rates

Evaluating the Grid
• Level of Service and Delay at Intersections
• LOS E (55 – 80 seconds of delay) is the standard for the
Reston Transit Station Areas
• VDOT and FCDOT have agreed on LOS E as the
standard for the Reston Transit Station Areas
• Queue Length (number of cars waiting at a signal)
• Walksheds – pedestrian accessibility
• Enhanced connectivity for transit
15

Mitigation
16

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)
• Mitigation will be the way we achieve LOS E in the
Transit Station Areas
• We are using mitigation measures that have the
lowest impact
17

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, Stakeholders, and
citizens
• Each grid link is initially assumed to be one lane in
each direction
– No turn lanes were initially assumed at new intersections
18
Additional coordination will be needed with VDOT on the
location of turn lanes at signalized intersections

2050 1st Tier
Recommendations
19

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
20

2050 1st Tier Signal Recommendations
21
26 New Signalized Intersection Locations
Sunrise 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.

• Unmitigated had 20 Problem Locations
• 10 intersections with delay over 120 Seconds:
1. Centreville Road & Sunrise Valley Drive
2. Monroe Street & Fox Mill Road
3. Spring Street & Herndon Parkway
4. Fairfax County Parkway & Baron Cameron Avenue
5. Fairfax County Parkway & Sunrise Valley Drive
6. Town Center Parkway & Sunset Hills Road
7. Reston Parkway & Baron Cameron Avenue
8. Reston Parkway & Bowman Towne Drive
9. Reston Parkway & Sunrise Valley Drive
10.Reston Parkway & South Lakes Drive
Problem Locations After Tier 1 Mitigation
22

2050 2nd Tier
Recommendations
23

24
Mitigation Measures
2nd Tier: Some Right of Way Impact
• Potential some ROW Mitigation Measures
– Signals were added where needed
– Turn lanes: left and right turn lanes
– Additional through lane
– Additional grid link

2050 2nd Tier Recommendations
25
New Signals
• New Dominion Pkwy. & Library St.
• Reston Station Blvd. & Soapstone Dr.
• Bracknell Dr. & Stevenage Rd.
• Reston Town Center West consolidated access

2050 2nd Tier Intersection Control
26

27
Turn Lanes
• Monroe St. & Frying Pan Rd./Fox Mill Rd.
• Reston Pkwy. & Sunrise Valley Dr.
• Sunset Hills Rd. &Town Center Pkwy.
• Wiehle Ave. & Reston Station Blvd.
• Wiehle Ave. & N Isaac Newton Sq.
• Monroe St. & future connection to Herndon
Metro Garage
Additional coordination will be needed with VDOT on the
location of turn lanes at signalized intersections

New Turn Lanes
28
Wiehle Ave. & N. Isaac Newton Sq.- EB left turn lane & WB right turn lane
Tier 1 Tier 2
PM: 103 sec.
PM: 65 sec.

Town of Herndon Comprehensive Plan Improvements
29
Worldgate Dr. &
Herndon Pkwy.
Monroe St. &
Worldgate Dr.
Monroe St. &
Herndon Pkwy.
Fairbrook Drive Extension Worldgate Drive Extension
New Signals
Worldgate Dr. Extension & Herndon Pkwy.
Herndon Pkwy. & Fairbrook Dr.

2050 2nd Tier Mitigation
Results
30

2050 Problem Locations
31
Intersections – 120+ Seconds of Delay
Intersections
2050 Unmitigated
After 2050
1st Tier
After 2050
2nd Tier
20 10 7
With signal re-timings and the introduction of
signals, there has been a reduction in the
projected number of intersections experiencing
delays in excess of 120 seconds

32
2050 Unmitigated Problem Locations

33
2050 1st Tier Problem Locations

34
2050 2nd Tier Problem Locations

35
• Unmitigated had 20 Problem Locations
• After 1st Tier: 10 Problem Locations
• After 2nd Tier: 7 Problem Locations
– 6 are associated with identified follow-on tasks
1. Fairfax County Parkway & Spring Street
2. Fairfax County Parkway & Sunrise Valley Drive
3. Reston Parkway & Baron Cameron Avenue
4. Reston Parkway & Bowman Towne Drive
5. Reston Parkway & Sunrise Valley Drive
6. Reston Parkway & South Lakes Drive

36
Fairfax County
Pkwy. & Spring St.
Reston Pkwy.
Capacity Improvements
Fairfax County Pkwy.
& Sunrise Valley Dr.

3rd Tier Mitigation
37

Mitigation Measures
3rd 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
38

Mitigation Measures
3rd 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
39

Funding Plan
40

Funding Plan Overview
• The plan focuses on how to best fund projects in the
Reston Transit Station Areas
• Projects included in the plan are those recommended in
the Reston Phase I Plan Amendment
• The plan will span 40 years (FY2015 - FY2054)
• The plan will build on priorities identified as part of the
Network Analysis
• The plan will determine funding allocation for projects
41

Reston Funding Plan Projects
42

Shared Funding Solution
• Public and private investment in Reston is necessary to ensure
Reston’s future success.
• Public funding means money from federal, state, local, and
regional sources.
– Multiple sources from each type
• Private funding means money from the following sources:
– Proffers from developers
– Contributions to a Road Fund (per square foot/per dwelling unit)
– In-kind Contributions
– New Revenue Source (tax district, service district, etc.)
43

Building the Funding Plan
• Discussion with Advisory Group
• Prepared preliminary cost estimates for roadway,
intersection, and grid improvements
• Potential revenue sources and funding mechanisms for
the plan
• Individual project prioritization (Network Analysis Study)
• Timing of funding needs
44

Building the Funding Plan Cont.
• Viable funding strategies
– Amount of public and private responsibility for plan costs
– Analysis of several funding scenarios that include use of a road
fund or a road fund in combination with a service or tax district
over Reston TSAs, Reston, and/or Special Tax District 5
– Non-viable scenarios have been removed based on initial
feedback include those that feature a service district over all of
Reston or a service district over Special Tax District 5, which
provide limited increases to support funding the plan
45

Next Steps
• Identify Tier 3 Mitigation Measures for:
– Fairfax County Parkway & Sunrise Valley Drive
– Fairfax County Parkway & Spring Street
– Reston Parkway
» Intersection improvements from Baron Cameron Avenue to
Lawyers Road
• Phasing Analysis
– Based on Existing Conditions
• Advisory Group Meeting on Funding Plan
46

Schedule
47
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) - Task complete advance to Tier 3
Mitigation
3A1 Analyze Future Conditions (2030)
3B Simulation of the Dulles Toll Road
3C Microsimulation - Optional
4A Meetings/Presentations
4B Additional Meetings/Presentations - Optional
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
12B Additional Meetings/Presentations - Optional
March 2016January 2016 February 2016 October 2016April 2016 May 2016 June 2016 July 2016 August 2016 September 2016
05/16/16

Questions & Comments
For questions and comments about the study please
contact:
Kristin Calkins: Kristin.Calkins@fairfaxcounty.gov
(703) 877-5710
http://www.fairfaxcounty.gov/fcdot/restonnetworkanalysis/
48

New Turn Lanes (Cont.)
49
Town Center Pkwy. & Sunset Hills Rd. - SB & NB left turn lanes
Tier 1 Tier 2
TownCenter
Pkwy.
Sunset Hills Rd. Sunset Hills Rd.
TownCenter
Pkwy.
AM: 106 sec.
PM: 157 sec.
AM: 41 sec.
PM: 40 sec.

New Turn Lanes (Cont.)
50
Wiehle Ave. & Reston Station Blvd.- WB left turn lane
Tier 1 Tier 2
AM WB approach:
121 sec.
AM WB approach:
60 sec.

Reston Network Analysis: Community Meeting Tier 1 & Tier 2

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