U.S. Route 1 in Washington, D.C.

U.S. Route 1 in Washington, D.C.
Fredddie, originally SPUI · Public domain · source
State	DC
Type	US
Length mi	7.2
Established	1926
Direction a	South
Terminus a	Alexandria, Virginia
Direction b	North
Terminus b	Mount Rainier, Maryland
Counties	Washington, D.C.

Contents

U.S. Route 1 in Washington, D.C. is the segment of the United States Numbered Highway System route that traverses the District of Columbia. Running from the Potomac River boundary with Virginia to the District of Columbia–Maryland border, the alignment threads through historic neighborhoods, federal landmarks, and key transportation corridors. The road connects arteries such as Alexandria, Arlington County, Georgetown, Downtown, Dupont Circle, and Brookland while interfacing with routes like Interstate 395, U.S. Route 50, and Interstate 295.

Route description

U.S. Route 1 enters the District from Arlington via the 14th Street Bridge complex and immediately interfaces with Interstate 395 and the George Washington Memorial Parkway. The corridor follows 14th Street Northwest and 14th Street Southwest adjacent to the Potomac River waterfront, skirting landmarks such as the Lincoln Memorial, the Washington Monument, and the Tidal Basin. Proceeding north, the route traverses Constitution Avenue, crosses near the World War II Memorial, and approaches the U.S. Capitol, the National Mall, and the Smithsonian Institution museums.

The route corridor traces early 17th century trails and the L'Enfant Plan of 1791 that shaped Washington, D.C.. As part of the original 1926 United States Numbered Highways design, U.S. Route 1 replaced earlier auto trails used by delegates and travelers between New York City, Baltimore, and Richmond, Virginia. Throughout the Great Depression, alignment improvements intersected New Deal projects, including works overseen by the Public Works Administration adjacent to sites like the Lincoln Memorial and the Jefferson Memorial.

Mid-20th century federal highway expansions, prompted by officials including President Dwight D. Eisenhower and agencies like the Bureau of Public Roads, brought grade separations near Interstate 295 and interchange reconfigurations at Anacostia River crossings. The route's corridors were affected by urban renewal initiatives from the Office of Redevelopment and controversies involving the National Capital Planning Commission and preservation groups such as the National Trust for Historic Preservation. Waterfront revitalization in the late 20th and early 21st centuries involved partnerships with entities like the U.S. Navy Yard redevelopment, the Anacostia Waterfront Corporation, and the District Department of Transportation.

- Southern entry: interchange with Interstate 395 / 14th Street Bridge and access to George Washington Parkway near Arlington National Cemetery and the Pentagon - Junction with U.S. Route 50 at Constitution Avenue adjacent to the National Mall and United States Capitol - Crossing near Federal Triangle with connections to Pennsylvania Avenue NW and Independence Avenue - Intersection at Dupont Circle connecting to Massachusetts Avenue and routes serving the Embassy Row and the National Cathedral - Northern section: merge with Georgia Avenue and connection to Columbia Heights and U.S. Route 29 approaches via Brookland–CUA rail links - Exit to Maryland: transition to Baltimore Avenue and links to Mount Rainier station and regional arterials leading toward Baltimore and Philadelphia

U.S. Route 1 serves as a principal arterial for intercity and local traffic, linking nodes such as Union Station, Ronald Reagan Washington National Airport, and the Silver Spring corridor. It intersects multiple transit hubs operated by Washington Metropolitan Area Transit Authority including Metrobus arteries and Metrorail lines like the Red Line and Green Line. Freight movements use nearby connectors to Interstate 95 and the Baltimore–Washington Parkway while commuter flows tie into Virginia Railway Express and Amtrak services at Washington Union Station.

The route influences land use around historic districts like Georgetown Historic District and commercial centers such as Penn Quarter, Chinatown, and 14th Street NW corridor. Safety and congestion concerns have engaged agencies including the District Department of Transportation, Metropolitan Washington Council of Governments, and advocacy groups like Greater Washington Partnership and Transportation Research Board affiliates. Seasonal tourism to destinations including the Smithsonian Institution, Cherry Blossom Festival, and monuments amplifies peak-period loads.

Planned improvements involve multi-agency coordination among the District Department of Transportation, Federal Highway Administration, and the National Capital Planning Commission to address multimodal access, resilience, and streetscape enhancements. Projects under consideration include bus-priority lanes coordinated with WMATA and Metrobus services, protected bicycle infrastructure aligned with Capital Bikeshare expansions, and signal timing upgrades supported by the Intelligent Transportation Systems Joint Program Office.

Longer-term proposals examine right-of-way adjustments near Anacostia River crossings to integrate pedestrian access to sites like the Anacostia Community Museum and the Frederick Douglass National Historic Site, stormwater mitigation consistent with District Department of Energy and Environment goals, and preservation-sensitive roadway modifications near the National Register of Historic Places listings. Coordination with regional initiatives—such as Vision Zero policies endorsed by the D.C. Council and congestion pricing studies involving the Metropolitan Washington Council of Governments—will shape funding and phasing.

Category:U.S. Highways in Washington, D.C.