Route 82 begins at a trumpet intersection with Route 9 at exit 7 in Chester and heads northeast into Haddam as a super two to an intersection with Route 154. The two routes briefly overlap before Route 82 continues east to the East Haddam Bridge over the Connecticut River, entering East Haddam near Goodspeed Opera House. On the east end of the village, it intersects the southern end of Route 149 At a junction with the south end of Route 151, Route 82 turns southeast  and enters  Lyme, where it turns east once again at a junction with the east end of Route 148.
Route 82 originates at a trumpet junction with Route 9 at exit 7 in Chester and travels northeast into Haddam as a super two to meet Route 154. The routes briefly share space before continuing east to the East Haddam Bridge over the Connecticut River, entering East Haddam near Goodspeed Opera House.