U.S. Route 101
The nearly highway's northern terminus is in Tumwater, Washington: the route remains along the Olympic Peninsula's coastal perimeter west, north, and east; the northernmost point on the highway is in Port Angeles. The southern terminus of US 101 is in Los Angeles at the East Los Angeles Interchange, the world's busiest freeway interchange.
Maine State Route 101
State Route 101 (SR 101) is a short state highway in extreme southern Maine. It follows a southeast–northwest trajectory, signed as south–north. SR 101 begins at an intersection with U.S. Route 1 (US 1) in Kittery, and runs northwest to the New Hampshire state line, where it continues as Gulf Road, an unnumbered local road in Dover towards New Hampshire Route 4.