Direction:
East/West
Western Terminus:
Judd Road (Oneida CR 840) and Halsey Road in Whitesboro
Eastern Terminus:
North-South Arterial Highway (NY 5/NY 8/NY 12) in New Hartford
Distance:
4.02 miles
Counties:
Oneida
Signed:
Yes

NY 840 is a short extension of the NY 8 expressway from New Hartford to Whitesboro. It begins at the point where NY 8 leaves the expressway to join NY 5/NY 12 along the North-South Arterial Highway and runs west as an expressway to Halsey Road in Whitesboro, where it becomes Judd Road (CR 840). CR 840 continues west for a few miles to end at NY 233 in Rome.

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