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.
New Jersey Route 101
Route 101 was a proposed state highway in the U.S. state of New Jersey. It was planned in 1939 as a freeway from Kearny to Hackensack, but it was never built. Route S101 was a northern extension of Route 101 planned at the same time from Hackensack through Paramus to the New York state line at Montvale. The section from Hackensack to Paramus was never built; the section from Paramus to the state line was built as part of the Garden State Parkway (Route 444) instead. Both designations were repealed in the 1953 renumbering.