Interstate 595 overlays 19.97 miles of U.S. 50 (John Hanson Highway) between the Capital Beltway (I-95/495) outside Washington and the interchange with MD 70 (Rowe Boulevard) at Annapolis. I-595 is the longest stretch of unsigned Interstate highway in the country.
Interstate 595 Maryland Guides
- U.S. 50 East - Prince Georges County
- U.S. 50/301 East - Annapolis to Queenstown
- U.S. 50/301 West - Queenstown to Bowie
- U.S. 50 West - Prince Georges County
Originally planned as Interstate 68, before I-68 was commissioned along the National Freeway west from Hancock to Morgantown, West Virginia, U.S. 50 was designated as Interstate 595 in 1991. Plans called for Interstate 595 shields to be placed alongside U.S. 50 on overhead signs. However, the Maryland State Highway Administration determined that having an extra route designation on this route might cause motorist confusion, so the decision was made to keep U.S. 50 as the primary signed route, but also include U.S. 50 in the Interstate Highway System inventory as I-595.
Page Updated 12-12-2020.