town-maintained road. Old Saybrook, Connecticut U.S. Route 1A (US 1A) in Old Saybrook, Connecticut, was designated on the current US 1 alignment on Boston Post Road. US 1 originally went to the town center using Old Boston Post Road then Main Street (now part of Route 154). The two routes were swapped around 1940. US 1A on Old Boston Post Road remained until the early 1970s. Waterford, Connecticut U.S. Route 1A (US 1A) in Waterford, Connecticut, in late 1948 was designated on the old US 1 alignment while US 1 was assigned as an expressway section between the Raymond E. Baldwin Bridge in Old Lyme and the Gold Star Memorial Bridge in New London in late 1948. The US 1 expressway later became part of the Connecticut Turnpike and I-95. The US 1 designation was removed from the expressway in 1975 and reverted to its old surface alignment. Groton, Connecticut U.S. Route 1A (US 1A) in Groton, Connecticut, was routes along Long Hill Road from the I-95 exit 85 offramp to Poquonnock Road. This was a newly constructed road in 1938 which later became US 1 by 1941. The original US 1 alignment used Thames Street and Poquonnock Road going through the old borough of Groton (now the city Groton). Mars Hill–Presque Isle, Maine References External links 01 Alternate Transportation in New London County, Connecticut 1A 01A