Preliminary Planning for Silver Line Underpass to Begin This Year

Local and state officials plan to explore options to build a Silver Line underpass from Town Center Parkway and Sunset Hills Road to Sunrise Valley Drive.

The project, which is expected to cost around $169 million, is in its early planning phases.

Pending the Fairfax County Board of Supervisors’ approval on Tuesday (May 15), the county’s transportation department and the Virginia Department of Transportation will propose three options for the four-lane underpass.

Preliminary engineering and designing will begin in fiscal year 2020. No timeline for construction has been set.

County officials said the project is a “high priority” to improve circulation in Reston, support traffic from additional development and improve connectivity in the overall road network.

In 2014, the county board approved a plan that recommended constructing the underpass west of Edmund Halley Drive and committed $8.7 million to advance the effort. Three years later, the board incorporated the project in Reston’s funding plan for transportation improvements.

The underpass is planned beneath a future Metrorail line. Metrorail tracks will span the future road roadway extension. 

The board will vote on the agreement between state and county officials to begin exploring options on Tuesday. The scope of the study includes:

  • A review of previous studies
  • Aerial mapping
  • Three planning and profile studies
  • A preliminary project cost estimate
  • Information on environmental impacts

Image via Google Maps

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