Northern Virginia North-South Corridor



Home > Northern Virginia North-South Corridor

Significant Corridors



Northern Virginia North-South Corridor

Improving Access and Mobility in Northern Virginia


On May 18, 2011 the Commonwealth Transportation Board (CTB) established a new Corridor of Statewide Significance (CoSS) in Northern Virginia. The Northern Virginia North-South Corridor is intended to be an integrated, multimodal transportation network that connects major centers of activity within and through the Commonwealth and promotes the movement of people and goods essential to the economic prosperity of the state.


The Corridor is defined as the area generally east and west of:


  • Route 234 (Dumfries Road) between I-95 and I-66;
  • The Bi-County Parkway between I-66 and Route 50; and
  • Northern connections to the Dulles Greenway and Route 7 along Northstar Boulevard and Route 659 (Belmont Ridge Road). 


The North-South Corridor is one of 12 corridors that have been defined throughout the Commonwealth of Virginia. The Office of Intermodal Planning and Investment, housed within the Office of the Secretary of Transportation, is the study sponsor. More information on the network of Corridors of Statewide Significance can be found at


Northern Virginia North-South Corridor Master Plan Now Available  (PDF, 7 MB)


Commonwealth Transportation Board (CTB) Involvement


Open House Meetings Information

On December 18 and 19, 2012, as well as on January 9, 2013, the North-South Corridor study team shared evaluation results of the transportation alternatives and preliminary recommendations. The alternatives will address access to major activity areas, transit service and non-motorized modes of travel, environmental considerations, and transportation funding and investments within the corridor.


Learn more about these alternatives by reviewing the meeting boards from both sets of meetings below. The second set of informational boards expands on initial model results, summarizes public comments received as of January 2nd, and provides recommendations for a refined third alternative. 


 Corridor Master Plan (CMP) Process Update

There are ongoing project studies within the North-South Corridor all which support the vision and goals of the North-South CMP. These studies include:

Bi-County Parkway Study Details

In November 2005, the Commonwealth Transportation Board (CTB) approved the location for a new 10.4-mile north-south transportation link that would connect Manassas with the Dulles corridor. The Bi-County Parkway would become the middle part of the proposed North-South Corridor.

The location of the Bi-County Parkway would be north of Interstate 66 in Prince William County, from the I-66 and Route 234 interchange, to Route 50 in Loudoun County.

The next step in the Bi-County Parkway study process is the completion of the final environmental impact statement (FEIS), which documents the action of the CTB, responds to comments received on the DEIS and addresses measures to mitigate impacts.

The FEIS is followed by a record of decision by the Federal Highway Administration. The FEIS is approved by the Federal Highway Administration and is expected to be completed in summer 2013.

Bi-County Parkway Resources: 

View related project pages to learn more about improving access to the Western side of Dulles Airport, and the proposed Manassas National Battlefield Park Bypass


© 2018 Commonwealth's Office of Intermodal Planning and Investment | WAI Compliance | Freedom of Information Act This website includes hyperlinks to sites neither controlled nor sponsored by the Commonwealth of Virginia. Links may open in a new window. Some resources on this site require the Adobe Reader. To receive this content in an accessible (federal section 508) format, call 1-800-FOR ROAD (1-800-367-7623).