Front Street, South Broad Street, North Broad Street, New Paris Road, Genesee Street, North-South Arterial Highway, Erwin Parkway, Main Street, Van Allen Road, Gifford Street, State Street, Arsenal Street, North Massey Street, Court Street Bridge, West Main Street, Bradley Street, James Street

Southern Terminus:
Front Street (US 11) and Castle Creek Road (US 11) in Binghamton
Northern Terminus:
NY 37 in Morristown
221.56 miles
Broome, Chenango, Madison, Oneida, Lewis, Jefferson, St. Lawrence

NY 12 is a major north/south route extending from Binghamton to the St. Lawrence River. It begins at US 11 and runs northeast toward Utica. In New Hartford, it joins NY 5 to become the North-South Arterial Highway. NY 8 also merges in after a short distance. The three routes follow the arterial through Utica to the beginning of I-790. All four are multiplexed for one exit, after which I-790/NY 5 splits off onto the service roads of the New York Thruway (I-90). NY 8/NY 12 continues north as an expressway. After another few miles, NY 8 splits off to become a surface road. NY 12 continues north as an expressway for another couple of miles, and then the expressway ends. NY 12 runs northwest to Watertown, where it crosses I-81. It continues north to the St. Lawrence River and then turns northeast along the river. It crosses I-81 again at its northernmost interchange before the Thousand Islands. It continues to follow the river to Morristown, where it merges into NY 37.

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