New York State Route 400 | ||||
|---|---|---|---|---|
| Aurora Expressway | ||||
 Map of the Buffalo area with NY 400 highlighted in red | ||||
| Route information | ||||
| Maintained by NYSDOT | ||||
| Length | 16.91 mi[1] (27.21 km) | |||
| Existed | January 1, 1970[2]–present | |||
| Major junctions | ||||
| South end |  NY 16 / NY 951V in Aurora | |||
  US 20A / NY 78 in East Aurora US 20 / NY 78 in West Seneca | ||||
| North end |   I-90 / New York Thruway in Buffalo | |||
| Location | ||||
| Country | United States | |||
| State | New York | |||
| Counties | Erie | |||
| Highway system | ||||
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New York State Route 400 (NY 400) is a 16.91-mile (27.21 km) freeway located within Erie County, New York, in the United States. The northwest end is connected to the New York State Thruway (Interstate 90 or I-90) and the southeast end terminates at NY 16 in the town of Aurora. NY 400, known as the Aurora Expressway, roughly parallels NY 16 between the two locations. It is most commonly used to carry traffic from Buffalo to the village of East Aurora, where Fisher-Price and Moog, Inc are headquartered. It is a busy commuter route to the southern suburbs. NY 400 is signed as a north–south route, although about half of the route runs more east–west.
The northwest end of NY 400 is in the southern part of Buffalo at the Thruway. The southeast end is north of the hamlet of South Wales, which is located in the town of Wales. At this end, the route connects to Olean Road and continues south as NY 16. The highway crosses Cazenovia Creek just before ending.