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Tysons January 15, 2013 1 Operational Analysis of Dulles Toll Road Ramps to Tysons Boone Boulevard Ramp Analysis Seyed Nabavi Fairfax County Department.

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Presentation on theme: "Tysons January 15, 2013 1 Operational Analysis of Dulles Toll Road Ramps to Tysons Boone Boulevard Ramp Analysis Seyed Nabavi Fairfax County Department."— Presentation transcript:

1 Tysons January 15, Operational Analysis of Dulles Toll Road Ramps to Tysons Boone Boulevard Ramp Analysis Seyed Nabavi Fairfax County Department of Transportation

2 Tysons Study Background 2 Tysons Comprehensive Plan Amendment Approved in June 2010 Study Kickoff in May 2011 Board Transportation CommitteeMay 8, 2012 Tysons Partnership BriefingMay 23, 2012 Public Information MeetingMay 30, 2012

3 Tysons Purpose of Study 3 Evaluate the feasibility of the three general ramp locations included in the comprehensive plan amendment West of Route 7 Between Route 7 and Spring Hill Road East of Spring Hill Road

4 Tysons Study Background 4

5 Tysons 5 Boone Boulevard Ramp Options

6 Tysons Developed several options for ramp to Boone Boulevard –The Western Ramp alignment (Previously Option 3) –One-lane ramp in each direction going through the back of Sheraton Hotel site. –A two-lane reversible ramp going through the back of Sheraton Hotel site (not precluding the one lane in each direction) –Four-lane ramp going through the back building of the Sheraton Hotel. (Ultimate condition when the site is totally redeveloped) Comparison of the Boone Boulevard alignments Purpose of Analysis 6

7 Tysons 7 Option A Western Ramp Alignment (Previously Option 3)

8 Tysons 8 Option B One Lane in each direction through Sheraton site

9 Tysons 9 Option C Two Lane Reversible Lane through Sheraton site

10 Tysons 10 Option D Four Lane Ramp through Sheraton site

11 Tysons 11 Traffic Analysis

12 Tysons 12 Traffic Volumes Option A attracts more traffic from Route 7 Option A provides shorter travel time to reach the center of Tysons West from Dulles Toll Road Options C and D provide comparable improvements to Route 7 in the peak direction Options A, B & D provide counter flow benefits Route 7 Traffic Volumes For Options (vehicles per hour) AlternativeNo BuildOption AOption BOption COption D Description No Ramp Western Ramp Alignment Alignment through back of Sheraton (one lane / direction) Alignment through back of Sheraton (reversible lanes) Alignment through back of Sheraton (two lanes / direction) Volume % ChangeVolume% ChangeVolume% ChangeVolume% Change AM Peak Eastbound % % % % Westbound %139-64%3920%88-77% PM Peak Eastbound %496-31%7140%464-35% Westbound %648-29%559-39%523-43%

13 Tysons 13 Comparison Matrix AlternativeOption AOption BOption COption D DescriptionWestern Ramp Alignment Alignment through back of Sheraton (one lane / direction) Alignment through back of Sheraton (reversible lanes) Alignment through back of Sheraton (two lanes / direction) Traffic Diverted to New RampHighMediumHigh Improvement to Route 7 Intersection Operations (AM / PM) Low / MediumHigh / HighLow / MediumLow / High Improvement to Grid of Streets Intersection Operations (AM / PM) Low / HighMedium / MediumLow / MediumLow / Low Existing Impervious Area / Proposed Impervious Area, SF 70,000 / 280,00040,000 / 150,00030,000 / 130,00050,000 / 190,000 ROW & Permanent Easement Areas, SF 290,00060,000 80,000 EnvironmentalVery High ImpactMedium Impact ConstructabilityMedium DifficultyHigh Difficulty Cost *$44,000,000$22,000,000$26,000,000$39,000,000 * Cost includes ramp improvements east of the DTR. ROW, utilities, drainage, environmental mitigation and/or reconstruction of impacted MWAA facilities are not included.

14 Tysons Option A provides traffic improvements to Route 7, however improvements are comparable to the other three options Option A adds significant impervious area for drainage of the project site Option A has significant environmental impacts compared to the other three options Options A is significantly more expensive than other three options Options B,C & D require less right of way and property owner is willing to consider Options B,C & D are challenging from a constructability stand point, but offer significant traffic benefits at a lower cost Conclusions 14

15 Tysons Western Ramp Alignment (Option A) will be eliminated from further study Options B,C and D will be coordinated with JBG, the developer of Sheraton site and the adjacent neighborhoods Options B,C and D will be investigated and analyzed further in combination with the other ramp connections in Tysons Conclusions 15

16 Tysons Next Steps / Schedule 16 Modeling currently underway –Expand Subarea Model January 2013 Dulles Toll Road Mainline Ramp Merge/Diverges Arterials/Grid –VISUM Simulation Analysis of 3 Alternatives January 2013 –Revise Alternatives Post Public Meeting No. 1 February 2013 –Submit Revised Alternatives to VDOT/MWAA for Review March 2013 –Select Preferred Ramp Alternative March 2013 –Additional Stakeholder Meetings March/April 2013 –Public Meeting No. 2 April 2013 –Incorporate Input April/May 2013 –Provide Recommendation to Board May/June 2013

17 Tysons 17 Questions / Discussion


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