U. S. Highway 5

Derby Line, Vermont – New Haven, Connecticut
Longest: 313
Current Mileage: 310

 

U.S. 5 is one of the original 1926 Highways. Its current route takes it through 3 states. In 1927-29 it also ran a few miles in New Hampshire.

Vermont – 198 Miles
New Hampshire – Decommissioned
Massachusetts – 58 Miles
Connecticut – 54 Miles