Route 103 continues north for another 0.8 miles (1.3 km), then intersects with Montowese Avenue, which is an unsigned state highway (SSR 715) signed for I-91 (at exit 9), and also leads to the Universal Drive shopping area.

Maple Avenue runs through some residential areas of North Haven towards the town center.

North of Broadway, the road is now known as Washington Avenue, which ends at the junction of Route 5 and 22 after another 280 yards (260 m).

[1] The section from Sackett Point Road in North Haven to the northern terminus at Route 5 and 22 is also known as the American Legion, Murray-Reynolds Post #76 Memorial Highway.

By the late 1930s, a parallel alignment west of the Quinnipiac River, along State Street, was designated as U.S. Route 5A.