It serves as the main north–south artery for the towns of Manchester, Vernon, Ellington, and Somers, and continues through East Longmeadow center into downtown Springfield.

It then continues north in Vernon as a 4-lane road where it narrows to 2 lanes shortly before a 0.81 mile overlap with Route 74.

Route 83 continues northwest, and crosses the Massachusetts state line into East Longmeadow.

Route 83 follows Sumner Avenue to its end then turns south on Longhill Street, which provides access to the ramps leading to I-91 and US 5.

[3] At about the same time, Massachusetts extended the route through East Longmeadow and Springfield as a town-maintained road.