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125.09 miles; from the Pennsylvania state line at Barryville, N. Y. to US 7 in New Milford. Route 55 travels the furthest west of any state highway from Connecticut. However, it extends only 2.64 miles in-state. |
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Route 55 was commissioned in 1932, from the earlier State Highway 129, and has had no changes in Connecticut. The route was designated earlier in New York state, in 1930. | |
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