Connecticut Route 80 is a 25.9 mile highway that runs through south-central Connecticut. The west end is at CT 17 in Quinnipiac Meadows neighborhood of New Haven, and the east end is at CT 154 in Deep River. Route 80 runs within 5 miles of many town squares- including Downtown New Haven.

Route 154 is a state highway in Connecticut running for 28.24 miles (45.45 km). It serves as one of the main thoroughfares in the town of Old Saybrook, intersecting twice with U.S. Route 1. North of I-95, Route 154 runs parallel to Route 9, along to the west bank of the Connecticut River. The route ends in Middletown at Route 9.