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Route 166 is the shortest signed state highway to cross a town line. The state did want to get rid of it in the early 1960s, but lost an arbitration dispute with the towns.

CT 166 History

In the 1920s, State Highway 166 followed today's Route 30 between Route 74 in Tolland and Route 190 in Stafford.

Route 166 was commissioned in 1935. In 1962, during the state highway reclassification effort, Route 166 was proposed to be decommissioned and turned over to the towns. However, local officials persuaded the state to keep the route.

CT 166 Sources