The address of the United States Department of Transportation, located on 7th Street. There are two streets in Washington, D.C. called 7th Street. One that runs southwest and northwest, and another that runs northeast and southeast. The headquarters of the United States Department of Transportation is located on the 7th Street that runs southwest and northwest. References ↑ As seen in the Department of Transportation commercial featuring Supergirl. ↑ As seen in the Department of Transportation commercial featuring Supergirl. External Links 7th Street (Washington, D.C.) at Wikipedia Retrieved from "https://superfriends.fandom.com/wiki/7th_Street_(Washington,_D.C.)?oldid=43083" Categories: Roads Locations Real locations Community content is available under CC-BY-SA unless otherwise noted.