Route 83 begins at the southern end of New London Turnpike in
Glastonbury near its junction with
Route 2 at exit 10. After crossing Route 2, it then heads north and crosses
Route 94 before entering
Manchester, where it serves as the main north–south thoroughfare of the town. Just before the center of town, it intersects
I-384 at exit 3. Within the town center of Manchester, a segment is town maintained between Hartford Road and Center Street, the latter of which carries
US 6/
44, the town's main east–west thoroughfare. It then continues north, and comes to a junction with
Route 30 at
I-84 exit 63. Route 83 overlaps with Route 30 for from Manchester into
Vernon, intersecting
I-84 once again at exit 64 before Route 30 turns off to the east. 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. It then turns north once again on the western edge of
Rockville Center, and crosses into
Ellington, where it has junctions with the northern end of
Route 286, and with
Route 140 in the center of town. It then continues north into
Somers, where it has a brief (0.02 mile) overlap with
Route 190. Route 83 continues northwest, and crosses the
Massachusetts state line into
East Longmeadow. In East Longmeadow, it proceeds north as Somers Road until a complex seven-way intersection (the East Longmeadow Rotary) that involves
Route 186 and
Route 220 among other roads. Beyond the Rotary, Route 83 continues northwest through East Longmeadow along North Main Street. After entering the city of Springfield, Route 83 shifts onto Belmont Avenue until it reaches a six-way intersection (known as "the X") where the route shifts again to Sumner Avenue. Route 83 follows Sumner Avenue to its end then turns south on Longhill Street, before becoming a short
divided highway providing access to the ramps leading to
I-91 and
US 5. ==History==