Capital Beltway South Side Mobility Study

The Capital Beltway South Side Mobility Study is a compilation of any available existing literature, analyses, studies, designs and reports that have been previously prepared by Stakeholder Agencies concerning mobility in Southern Capital Beltway Study Area. The Study Area is defined by the Beltway from and including the Springfield Interchange on the west to Maryland Route 5 on the east.

Phase 1 of the study examines information and data that supports decision making in whether a high occupancy vehicle (HOV) system is expected to be available within the study limits at some time after the Woodrow Wilson Bridge (WWB) project is completed, making the use of HOV lanes across the WWB feasible. The study also includes reviewed planned and existing projects that may also include (besides HOV) heavy rail, light rail, bus rapid transit, high occupancy toll lanes, and managed lanes. Phase 1 results are shown in this web site.

Phase 2 of the study consists of a market analysis which addresses the longer-term use of the 11th and 12th lanes. The study provides descriptions of forecasted future trips across the WWB and how compatible they would be with different types of transportation improvements. This was a high-level analysis, starting with an identification of geographic markets and broadly defined transportation modes. It is intended to determine, based on data and assumptions in the currently adopted Metropolitan Washington Council of Governments (MWCOG) travel model, where demand for travel in the vicinity of the WWB would exist, and what the characteristics of this travel would be. The Phase 2 report is now available below.

Stakeholder Agencies Include:

  • Virginia Department of Transportation
  • Maryland Department of Transportation (Maryland State Highway Administration & Maryland Transit Administration)
  • Washington Metropolitan Area Transit Authority
  • Virginia Department of Rail and Public Transportation
  • Metropolitan Washington Council of Governments (Department of Transportation Planning)
  • Fairfax County, Virginia; Department of Transportation
  • City of Alexandria, Virginia; Department of Transportation and Environmental Services
  • Prince Georges County, Maryland; Department of Public Works and Transportation
  • District of Columbia Department of Transportation
  • Federal Highway Administration
  • Federal Transit Administration

Phase 1 Final Report

Phase 1 Final Map

Phase 2 Final Report

Interactive MapReport