Proposed
Fairfax County Parkway Interchange Improvements |
| Improving access from northbound I-95 and Rolling Road |
Area Map
Project at a Glance
About the Project
This project proposes interchange improvements at two locations—Fairfax County Parkway (Route 7100) and I-95, and Fairfax County Parkway and Rolling Road (Route 638)—to help meet projected increases in future traffic demands.
Project Details and Alternatives
Click here for a detailed map of the proposed improvements.
Proposed improvement: Construct a flyover ramp from northbound I-95 to northbound Fairfax County Parkway.
To allow traffic to continue to access northbound Backlick Road and the future interchange at Boudinot Drive, alternatives are to:
- Keep the existing loop ramp open
- Eliminate the existing loop ramp and build left-turn lanes at the end of the ramp at Fairfax County Parkway and Loisdale Road.
Proposed improvement: Widen the one-lane loop ramp to two lanes from north and southbound Rolling Road to Fairfax County Parkway north.
- Alternative C: Widen the ramp to the outside with curb and gutter.
- Alternative D: Widen the ramp to the outside with a paved shoulder.
- Alternative E: Eliminate the existing free flow right exit onto the loop by bringing the northbound right-turn lanes to a signalized intersection. This would address a safety conflict between traffic entering the loop from the northbound direction and traffic entering the loop from the southbound direction.
- No-build Alternative: A no-build alternative is under consideration and is being used as a benchmark to assess environmental impacts. While it would not affect any natural, ecological, or cultural resources, it would not satisfy the transportation needs.
Background
Traffic demand on these ramps is expected to increase over the next 20 years due to the extension of the Fairfax County Parkway, regional population and employment growth, and the relocation of 8,500 employees under Base Realignment and Closure (BRAC) efforts to the Fort Belvoir North Area, located west of I-95 and east of the Fairfax County Parkway.
Daily forecasted volume on the ramp from northbound I-95 to westbound Fairfax County Parkway is projected to increase nearly 300%, and volume on the ramp connecting northbound and southbound Rolling Road to westbound Fairfax County Parkway is expected to increase about 340%.
The existing ramps cannot adequately handle the forecasted volumes. The proposed project will address specific traffic deficiencies at the interchanges, namely the relatively low capacity of the one-lane loop ramps, to accommodate the increases.
Traffic Report
Schedule and Cost
Total cost is currently estimated at $96.4 to $105.5 million, including $8.6 million for engineering, $24 million for right of way and utilities and $63.8 to $72.9 million for construction.
A project construction schedule will be developed once funding has been identified.
Environmental Impacts
An environmental assessment was prepared and approved by the Federal Highway Administration for this project, and includes a full listing of considered impacts and additional findings from the environmental evaluation.
Environmental Assessment
Air Quality Analysis
Noise Analysis
Archaeology Summary
Resources
A design public hearing for this project was held June 16 in Springfield.
Meeting Announcement
Public Hearing Presentation (5MB)
Public Hearing Brochure
Public Hearing Comment Sheet (comments must be received by June 26, 2010)
State Project: BRAC-96A-101,P101,N501 Federal Project: NH-000S(218) UPC: 81738
