New York State Route 320 (NY 320) is an east–west state highway located within Chenango County in the central part of New York in the United States. It extends for 3.55 miles (5.71 km) from an intersection with NY 12 north of the city of Norwich to a junction with Tiffany Road in the town of North Norwich. The road shifts from state to county maintenance at the latter junction, and NY 320's right-of-way continues northeast from Tiffany Road as County Route 29 (CR 29). NY 320 was assigned as part of the 1930 renumbering of state highways in New York.

New York State Route 12 (NY 12) is a state highway extending for 222.27 miles (357.71 km) through central and northern New York in the United States. The southern terminus of the route is at U.S. Route 11 (US 11) in the town of Chenango in the Southern Tier. The northern terminus is at NY 37 near the village of Morristown in the North Country. In between, the route serves three cities of varying size: Norwich, Utica, and Watertown. NY 12 intersects several primary routes, including US 20 in Sangerfield, New York State Thruway via Interstate 790 (I-790) in Utica, overlaps NY 28 from Barneveld to the town of Remsen, NY 3 in Watertown, and I-81 in Pamelia and Orleans.