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.
Illinois Route 101
Illinois Route 101 is a east–west state road that runs from to the intersection of Illinois Route 61 in Augusta east to U.S. Highway 67 one mile (1.6 km) east of Littleton. The highway was officially established in 1924 along its current alignment. Route 101 is maintained by the Illinois Department of Transportation.