 Between I-95 and the Durham town line, Route 77 is known as Durham Road.It has a junction with Route 80 (leading to Killingworth and North Branford) about north of I-95, then crosses into the town of Durham, where the road changes name to Guilford Road.Route 77 runs for another in Durham and ends at an intersection with Route 17 just south of the town center, near the northern end of Route 79.