US 151 south end, 1940-1981
US Highway endpoints in Iowa
The URL for this map ends with the 2-letter state abbreviation "IA"; if you'd like to see endpoints in Illinois, just replace the "IA" with "IL". You can quickly jump to any other state using that method, with a few exceptions: for any of the six New England states, use "ME". For Delaware, use "MD". For Nevada, use "CA".