Bi-County Parkway

The Alliance recommends constructing a limited access corridor extending the Route 234 Bypass between I-66 in Prince William County and Northstar Boulevard north of US Route 50 in Loudoun County. This new corridor would provide a much needed direct north-south connection between the two fastest growing counties in the region, Loudoun and Prince William Counties, and Dulles Airport.

Virginia’s 2nd & 4th Largest Jurisdictions Connected Largely By Narrow Rural Roads

February 15, 2018 in: Bi-County ParkwayRoute 28StudyTraffic CongestionTransportation Funding

Virginia’s 2nd & 4th Largest Jurisdictions Connected Largely by Narrow Rural Roads The University of Virginia Weldon Cooper Center’s latest data shows that Prince William County (455,000) is now Virginia’s second most populous jurisdiction and Loudoun County (396,000) its fourth. Since 2000 Loudoun County has added 226,000 residents and Prince William County 175,000 residents. (The District of Columbia […]


Northern Virginia Business Transportation Coalition’s Performance-Based Solutions for Enhanced Regional Prosperity, Security and Quality of Life

January 16, 2018 in: 2018 General AssemblyAlliance PositionBi-County ParkwayNorthern Virginia Transportation CoalitionPotomac River CrossingPrioritizationRegional Express BusRoute 28TransitTransportation Funding

Northern Virginia Business Transportation Coalition’s Performance-Based Solutions for Enhanced Regional Prosperity, Security and Quality of Life The Northern Virginia Business Transportation Coalition consists of private sector organizations representing most Northern Virginia businesses and private sector employees and is committed to creating a strong efficient regional transportation network to enhance regional prosperity, security and quality of […]


Air Quality Keeps Getting Better and Better

November 7, 2017 in: Air QualityAlliance PositionPrioritization

Air Quality Keeps Getting Better and Better Despite one of the warmest summers on record, the Virginia Department of Environmental Quality reports that Virginia had “the cleanest ground level ozone season” in at least 20 years and that it will seek a new federal Environmental Protection Agency designation for Northern Virginia. Air quality pollutants have shown […]

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Bi-County Parkway Overview


The Bi-County Parkway’s (BCP) need and benefits are well-documented by the 2005 Draft Tri-County Environmental Impact Statement (EIS) and Location Study as well as several local studies. Over the next 30 years, Loudoun and Prince William Counties will add 300,000 new jobs and have a combined population of 1.2 million. Today, there are 200,000 north-south vehicle trips a day in the region, which will grow to nearly 400,000 trips by 2040.

The 2005 Draft EIS and Location Study said, “This (bi-county) corridor affects the largest decrease in hours of delay over the no build alternative.” It also ranks second in alternatives studied in reducing vehicle miles of travel.

To read the entire draft EIS click here. The Bi-County alignment was studied as part of the Tri-County Location Study. 

The Bi-County Parkway also:

  • Was selected in November 2005 by the Commonwealth Transportation Board (CTB) as its preferred alternative.
  • Has appeared on Loudoun and Prince William County master plans for decades.
  • Appears in the Northern Virginia Transportation Authority’s TransAction 2040 regional plan, the National Capital Regional Transportation Planning Board’s (TPB) 2040 fiscally Constrained Long Range Plan, and the Commonwealth of Virginia’s statewide long range plan.
  • Is located within and is a key component of Northern Virginia’s North-South Corridor of Statewide Significance created and designed by the Commonwealth Transportation Board in 2011. You can read the CTB resolution here.   You can also read the North-South Corridor Master Plan Study here.

The Bi-County Parkway commands broad support with Northern Virginia’s private sector, which recognizes its importance in connecting Northern Virginia (and Virginia’s!) second and third largest counties as well for the improved access it provides to Washington Dulles International Airport.

The Bi-County Partnership is a coalition formed to increase public awareness of the importance and benefits of the BCP. The Partnership consists of the Loudoun County Chamber of Commerce, Prince William Chamber of Commerce, Dulles Regional Chamber of Commerce, Committee for Dulles, Dulles Area Transportation Association, Dulles South Alliance, Washington Airports Task Force and the Northern Virginia Transportation Alliance.

Click here to read the Partnership’s letter to Governor McAuliffe.

Click here to read the Partnership’s letter urging Virginia House Appropriations Committee members to oppose proposed budget amendments to delay, increase the cost of and kill the Parkway.

Project Status

The Bi-County Parkway was approved by the Commonwealth Transportation Board in November 2005. The Parkway is a new 10.4-mile north-south transportation link would connect Prince William County and the City of Manassas with Loudoun County and the Dulles 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 Bi-County Parkway study process is awaiting sign-off of the environmental impact statement and a favorable record of decision by the Federal Highway Administration and review by Virginia’s new HB 2 project evaluation process. The Draft Environmental Impact Statement was essentially completed in 2005 and has been a political football for ten years.

Despite strong evidence showing the future demand and benefit of a Bi-County Parkway, on March 15, 2016 the Prince William Board of County Supervisors voted 4-3 to remove the roadway from the County’s comprehensive plan.  This is not the first time a Northern Virginia locality has taken action to delay, downsize or defeat and run-up the cost of badly needed transportation improvements. Read more about why it’s not by accident area residents lose more time and money stuck in congestion than just about anyone in the nation here.

Invest in a Better Bi-County Parkway

If better transportation is a priority to you, your family, or your business—invest in the NVT Alliance. Your tax-deductible contribution is an investment in the quality of life of Northern Virginia.

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