New York State Route 17J

New York State Route 394
Map of southwestern New York with NY 394 highlighted in red
Route information
Maintained by NYSDOT and the city of Jamestown
Length:	52.32 mi (84.20 km)
Existed:	November 1973 – present
Major junctions
West end:	NY 5 in Westfield town
	I-90 / New York Thruway near Westfield village NY 430 in Mayville I-86 / NY 17 / Southern Tier Expressway near Bemus Point NY 60 in Jamestown US 62 in Poland
East end:	I-86 / NY 17 in Coldspring
Location
Counties:	Chautauqua, Cattaraugus
Highway system
New York Highways Interstate U.S. State Reference Parkways ← NY 393 NY 395 → ← NY 17G NY 17K →

New York State Route 394 (NY 394) is a state highway located within Cattaraugus and Chautauqua counties in southwestern New York in the United States. Its western terminus is located on the shore of Lake Erie at an intersection with NY 5 in the Westfield hamlet of Barcelona. The eastern terminus is located at an interchange with the Southern Tier Expressway (Interstate 86 or I-86 and NY 17) at the Coldspring hamlet of Steamburg. From Mayville to Jamestown, NY 394 follows the western edge of Chautauqua Lake. East of Jamestown, the route straddles the Southern Tier Expressway and connects to the highway in four different locations, including at its eastern terminus.

The segments of NY 394 between Westfield and Mayville, as well as east of Jamestown were originally designated as NY 17 in 1924. Six years later, the remainder of current NY 394 gained a pair of designations as part of the 1930 renumbering of state highways in New York; however, by the mid-1940s, the Mayville–Jamestown stretch was solely designated as New York State Route 17J. In November 1973, NY 17 was realigned onto the new Southern Tier Expressway east of Jamestown. The former alignment of NY 17 between Jamestown and Steamburg and all of NY 17J were redesignated as NY 394. NY 394 was extended westward to Barcelona shortly afterward. Today the route is also concurrent with part of New York State Bicycle Route 17.