U.S. Route 1, NH 1B to ME State Line

AMP: N/A

Location: State St and Dutton Ave, Portsmouth

After Route 1B, keep left for Dutton Avenue to Maine.

Location: Dutton Ave and State St, Portsmouth

U.S. 1 crosses the Piscataqua River to Kittery, Maine.

N to ME-103, S to NH 1A

S to NH 1A