Interstate 495

Interstate 495 is a 64 mile Interstate loop that surrounds Washington, D.C. With the exception of a small segment near the western end of the Woodrow Wilson Bridge over the Potomac River which is technicall Washington, the Beltway is entirely in Maryland and Virginia. Known as the Capital Beltway, or simply the Beltway, most interchanges provide access to D.C. with I-95 and I-295 from the south, I-66 to the west, and U.S. Highway 50 to the east.