AMP: 1 Location: Elm St and Stonington-Westerly Rd, Stonington Reassurance shield as US 1A begins. AMP: 1 Location: Elm St and Alpha Ave, Stonington .7 miles later, keep right to head into Stonington center, which is a rare Connecticut borough. AMP: 1 Location: Alpha Ave and Elm St, Stonington Reassurance shield after we keep right. … Continue reading U.S. Route 1A, US-1 to US-1