CT 21 Travel Info
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Route 21 is a 5.67-mile (9.12 km) state highway in rural northeastern Connecticut. It extends from Route 12 in Killingly to Route 193 in Thompson. It serves as an alternate to Route 12 in the town of Putnam.
Route 21 begins as Thompson Pike at an intersection with Route 12 in northern Killingly and heads north towards the town of Putnam. It crosses into t ... more
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