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.
Texas State Highway 101
SH 101 was previously designated on February 17, 1925 on a route from Snyder to Colorado City. Another route from Georgetown east to SH 95 at Circleville was also designated on May 4, 1925. On March 18, 1927, the SH 101 from Georgetown to Circleville was renumbered as SH 104. As a result, there was only one SH 101 from Snyder to Colorado City. On November 30, 1932, SH 101 extended south to Sterling City. By 1936, the route was complete from Snyder to Colorado City, but was still an earthen road. By 1939, it was completed, with a terminus just west of Sterling City. The section north of Colorado City was transferred to SH 208 on February 23, 1956, with the remaining portion of the route cancelled and transferred to the northern extension of SH 163 on September 27, 1957. The current route was designated on its current path on November 25, 1975 to replace US 81 and US 287, which were routed onto a new built upgraded parallel path, and State Highway 114, which was moved to a different routing in the state.