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.
Minnesota State Highway 101
The U.S. Highway 169 bypass east of downtown Elk River was built in 1961, and old Highway 101 was extended north on old Highway 169 ("Jackson Avenue") to the north end of the bypass. Later, in 1968, the bypass was extended south to old State Highway 152 in Rogers, and Highway 101 was realigned to be concurrent with old Highway 152 and use the new bypass from Rogers north to Elk River. The original alignment of Highway 101 was turned over to the counties (renumbered as County 13 / "Brockton Avenue" in northern Hennepin County and County 42 in Wright County), and the extension north of downtown Elk River was renumbered "State Highway 201" until 1987. Highway 101 was realigned to the present day "County Road 101" between Savage and downtown Shakopee in 1940. In 1964, the State Highway 5 bypass of downtown Chanhassen was built, but Highway 101 remained on the old route until the 1980s, when it was moved to the bypass. The relocation of State Highway 55 at Plymouth / Medina, and with it the brief Highway 55 / 101 concurrency, came in 1942 west of and 1954 east of the intersection with the old alignment.