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

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

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

Tysons Study Background 4

Tysons 5 Boone Boulevard Ramp Options

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

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

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

Tysons 9 Option C Two Lane Reversible Lane through Sheraton site

Tysons 10 Option D Four Lane Ramp through Sheraton site

Tysons 11 Traffic Analysis

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%

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.

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

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

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

Tysons 17 Questions / Discussion