. U.S. Route 5 is a north-south United States highway.
. This highway was formed in 1926. It parallels Interstate 91.
. US 5 passes three states, Connecticut (54.59 miles), Massachusetts (53.43 miles) and Vermont (192.32 miles).
. Its major junctions include I-91 in New Haven, CT (Connecticut), I-90 near Hartford, CT (Connecticut), I-90 near Springfield, MA (Massachusetts), and US 4 in white river Junction, Vermont.
. The highway's northern terminus is in Derby Line, Vermont at the Canadian border, where it continues as provincial highway 143.
. Its southern terminus is in New Haven, Connecticut at an intersection with Intestate 91.