Operational Analysis of Dulles Toll Road Ramps to Tysons May 31, 2012

1. May 31, 2012
Operational Analysis of
Dulles Toll Road
Ramps to Tysons
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2. Agenda
• Review of Boone Blvd. Connection
• Review of Progress
• Preferred Options
• Public and Stakeholder Outreach Schedule
• Next Steps
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3. Boone Boulevard Extension
• First step in creating the envisioned street
grid and expanded roadway network
• Improve connectivity and parcel access due
to the loss of the Route 7 service roads
• Provides one leg of a parallel road system on
both sides of Route 7; Greensboro Drive is
the other leg.
• Considers context-sensitive solutions
• Minimizes Community and Environmental
impacts
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4. Boone Boulevard Extension
Recommended Cross Section
• 12’ wide landscaped median (or single-left turn lanes as needed)
• Two 11’ travel lanes in each direction
• 5’ wide bike lane in each direction
• 8’ wide parking lane in each direction
• 5’-6’ wide landscaped buffer
• 8’-10’ wide sidewalk
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5. Boone Boulevard Extension
Recommended Alignment 5

6. Review of Progress
• Study Kickoff May 24, 2011
• Data Gathering & Analysis June - August 2011
• Alternatives Workshop September, 2011
• Monthly Progress Meetings Ongoing
(Included representatives from FCDOT, VDOT & MWAA)
• Selection of Preferred Options September, 2012
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7. Preferred Options
• Developed nine scenarios including providing
upgrades to existing Route 7 and Spring Hill Road
Interchanges
• Improvements to existing Route 7 and Spring Hill
Road Interchanges were not cost effective based on
the minimal capacity added
• Compared three preferred alternatives against the
“No Build” Alternative
• Measured the Network Performance of each
preferred option and compared traffic operations
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8. Preferred Options
DTR & Route 7
DTR & Route 7 2030 No Build
Modified Interchange
Diversion Diamond
(Flyover Ramp)
Compare 2030 No Build vs.
Preferred Option Preferred Interchange 2030 No Build
modification Option
Preferred Option 2030 No Build
Preferred Option Preferred Option Combined with
Combined with
Combined with Combined with Boone Blvd. Ramp &
Greensboro Dr. Ramp
Boone Blvd. Ramp Urban Frontage Road Greensboro Dr. Ramp
& Boone Blvd. Ramp
& Jones Br. Dr. Ramp & Jones Br. Dr. Ramp
2030 No Build
Preferred Option
Preferred Option Combined with
Combined with
Combined with Boone Blvd. Ramp &
Greensboro Dr. Ramp
Urban Frontage Road Greensboro Dr. Ramp
& Boone Blvd. Ramp
& Jones Br. Dr. Ramp
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9. Preferred Options
2030 No Build
2030 No Build
Preferred Option
Preferred Option Combined with
Combined with
Combined with Boone Blvd. Ramp &
Greensboro Dr. Ramp
Urban Frontage Road Greensboro Dr. Ramp
& Boone Blvd. Ramp
& Jones Br. Dr. Ramp
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10. Preferred Options
Preferred Option 1 – Boone Boulevard, Greensboro Drive
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11. Preferred Options
Preferred Option 2 – Urban Frontage Road
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12. Preferred Options
Preferred Option 3 – Boone Boulevard, Greensboro Drive, Jones Branch
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13. Pros & Cons of The Options
• Cons:
– Impacts to RPA (Boone Blvd. Connection)
– Impact to Parkland (Boone Blvd. Connection)
– Impact to Residential Communities (Boone Blvd. Connection & Urban
Frontage Option)
– Impact to Dominion electrical substation
– Relocation of DTR Administration Building/Facilities
– Impact on the Adjacent Developments
– Impact on the Aesthetics
• Pros:
– Reduces traffic volume on existing interchanges
– Improves Mobility within Tysons
– Effective in handling traffic volumes in and out of Tysons
– Provides better distribution of traffic to the future street grid system
– Minimizes entry and exit ramps from/to DTR (Urban Frontage Option)
– Fits within the urban character of redeveloped Tysons (Urban Frontage
Option) 13

14. Traffic Analysis
• Measures of Effectiveness Considered:
Average Delay / Vehicle
Average Speed / Vehicle
Total Delay
Total Travel Time
Merge/Diverge Conditions
• Compared all options with the No-Build
Condition
• Option III showed Improvement in the AM.
• Option II showed improvement in PM.
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15. Next Steps
• Tysons Partnership Briefing May 23, 2012
• Public Information Meeting May 31, 2012
• Evaluate Impacts Summer 2012
(Meetings with VDOT, MWAA, Land Owners, Developers & Utilities)
• Second Public Information Meeting Fall 2012
• Study Completion Winter 2012
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