In the 1920s, State Highway 126 followed today's US 7 between US 1 and Route 35. Until about 1928, US 7 actually followed today's NY 22 outside Connecticut toward New York City.

The modern Route 126, commissioned in 1932, originally ran from Route 63 to Falls Village. It eventually was extended to US 44.

• Route 126 Ends (Photos; Doug Kerr at state-ends.com)