U.S. Route 101
U.S. Route 101, or U.S. Highway 101 (US 101) is a north–south United States Numbered Highway that runs through the states of California, Oregon, and Washington, on the West Coast of the United States. It is also known as (The Royal Road) where its route along the southern and central California coast approximates the old trail which linked the Spanish missions, pueblos, and presidios. It merges at some points with California State Route 1 (SR 1).
U.S. Route 151
US 151 was one of the original U.S. Highways from 1926. At the time, it only ran from Fond du Lac, Wisconsin to Madison. Originally, the highway ended at Western Avenue and Main Street in Madison. In 1934, the highway was extended southwest to Cedar Rapids, Iowa, incorporating the full length of former U.S. Highway 118 (Dodgeville to Dickeyville) and part of former U.S. Highway 161 (Dubuque to Cedar Rapids; US 161 from Cedar Rapids south to Keokuk became US 218). At the time, the southern end of the route was at Williams Blvd SW and 16th Ave SW, what was then US 30 and US 218. In the 1940s, the highway was extended northeast to Manitowoc.