U.S. 1

U.S. 1 angles seven miles through Washington, DC, sharing alignments with I-395 across the 14th Street Bridge and U.S. 50 along Constitution Avenue NW and 6th Street NW. The route spurs north from I-395 along an expressway by the Thomas Jefferson Memorial onto 14th Street across the National Mall. Turns onto Constitution Avenue and Rhode Island Avenue from 6th Street NW are not marked.

U.S. 1 North
Jefferson Drive east at U.S. 1 (14th Street SW) at The National Mall. Jefferson Drive ventures east to the Smithsonian Institution Building and 3rd Street SW on the Mall. Photo taken 08/01/05.
Directly east from the Washington Monument is the U.S. Capitol. Photo taken 08/01/05.
The Washington Monument rises prominently from The National Mall midway between 15th Street and 17th Street, west of U.S. 1 (14th Street SW). Photo taken 08/01/05.
Replaced by 2007 and removed by 2014, a guide sign posted along U.S. 1 (14th Street SW) north at Madison Drive NW featured black and white Interstate shield shapes in place of US markers. This was the lone sign posted for the upcoming turn of U.S. 1 north onto U.S. 50 (Constitution Avenue NW) east. The overlap is now unsigned. Photo taken 08/01/05.
U.S. 1 North U.S. 50 East
U.S. 1 north & 50 (Constitution Avenue NW) east next intersect 12th Street NW and the 12th Street Expressway north. The Expressway flows north from I-395 north to a tunnel below the National Mall. Photo taken 06/01/04.
9th Street NW south becomes the 9th Street Expressway south of U.S. 1 & 50 (Constitution Avenue NW). The southbound expressway passes through a tunnel below the National Mall to emerge at ramps for Interstate 395 (Southwest Freeway).
This small guide sign was removed by 2009, leading no indication of the connection with I-395 for Constitution Avenue. Photo taken 06/01/04.
U.S. 1 north & 50 (Constitution Avenue NW) approach 6th Street NW. Despite the signage here, which was removed by 2007, both U.S. 1 and U.S. 50 turn north onto 6th Street. This intersection is located adjacent to the National Museum of Art-West Building. The U.S. Capitol is still ahead, so to reach the U.S. Capitol and its Reflecting Pool, continue east on Constitution Avenue. Photo taken 06/01/04.
U.S. 1 and U.S. 50 leave Constitution Avenue NW for 6th Street NW north to New York Avenue NW. This lone remaining sign for U.S. 50 was removed after 2011, leaving no indication that the US highway pair turn here. Photo taken 07/05/10.
Now on 6th Street northbound, U.S. 1 & 50 pass through a more traditional urbanized area, with some moderate high-rises. Photo taken 07/05/10.
6th Street NW doubles as an Alternate route for Interstate 395 north to New York Avenue. This shield assembly resides at Indiana Avenue NW. Photo taken 06/01/04.
An older sign indicates that traffic to U.S. 50 east to New York Avenue and Baltimore bound traffic via the Baltimore Washington Parkway should remain along 6th Street NW north at Massachusetts Avenue NW. Photo taken 06/01/04.
2 photos
2 photos
A remnant trailblazer sign for Interstate 95 (removed by 2011) was posted along U.S. 1 north & 50 (6th Street NW) north at K Street NW. Interstate 95 was dropped along the Center Leg Freeway in 1977, leaving New York Avenue east to the Baltimore Washington Parkway as the connection from I-395 north to I-95 north. Photos taken 06/01/04.
U.S. 1 continues north along 6th Street while U.S. 50 turns east along New York Avenue. Naturally, there are no U.S. 1 or U.S. 50 shields in advance of or at this intersection. Just be looking out for U.S. 50 to continue east on New York Avenue! Photo taken 06/01/04.
U.S. 1 North
Former U.S. 1 reassurance marker posted along 6th Street NW at M Street NW. This assembly was removed by 2007. Photo taken 01/20/00.
U.S. 1 South
U.S. 1 south splits with U.S. 50 (Constitution Avenue NW) west for 14th Street NW. 14th Street carries the route southward across The National Mall. This scene looking south from Constitution Avenue changed in 2014 with construction underway for the adjacent Smithsonian National Museum of African American History & Culture. Photo taken 08/01/05.
Madison Drive NW intersects U.S. 1 (14th Street NW) between 12th and 15th Streets on The National Mall. Photo taken 08/01/05.
Interstate 495 trailblazer directing travelers southward on U.S. 1 (14th Street SW). U.S. 1 merges with Interstate 395 across the Potomac River, with the freeway carrying drivers south to the Springfield Interchange and Interstates 95 and 495. Photo taken 08/01/05.
Jefferson Drive SW flows east from 15th Street on The National Mall to 3rd Street SW. Photo taken 08/01/05.
Southbound U.S. 1 (14th Street SW) at C Street SW east next to the Department of Agriculture, Bureau of Engraving and Printing, and the U.S. Holocaust Memorial Museum. Photo taken 08/01/05.

Photo Credits:

  • 01/20/00 by Jeff Royston.
  • 06/01/04 by AARoads.
  • 08/01/05 by AARoads.
  • 07/05/10 by AARoads.

Connect with:
Interstate 395
U.S. 50

Page Updated 06-11-2014.