New York State Route400 (NY400) is a 16.91-mile (27.21km)freeway located within Erie County, New York, in the United States. The northwest end is connected to the New York State Thruway (Interstate90 or I-90) and the southeast end terminates at NY16 in the town of Aurora. NY400, known as the Aurora Expressway, roughly parallels NY16 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. NY400 is signed as a north–south route, although about half of the route runs more east–west.
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New York State Route 400
Aurora Expressway
Map of the Buffalo area with NY400 highlighted in red
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 NY16. The highway crosses Cazenovia Creek just before ending.
Route description
NY400 begins northwest of the hamlet of South Wales in the town of Aurora; however, South Wales, situated less than 0.5 miles (0.8km) southeast of the route's end, is located in the adjacent town of Wales. At its southern end, NY400 splits off of Olean Road, taking with it NY16 which occupies Olean Road to the south. The two routes head north-northwest from here as the Aurora Expressway through rural areas in the town of Aurora. After passing by Emery County Park, NY16 leaves the expressway back onto Olean Road on one of three junctions that only allow access in one cardinal direction, this one to the south as a northbound exit and southbound entrance. NY400 continues heading in a primarily northward direction; however, it briefly turns back in a slight east direction to avoid the village of East Aurora.
NY400 and NY16 at the beginning of NY400 in Wales
Remaining rural, NY400 crosses just to the east of East Aurora, encountering U.S. Route20A (US20A) and NY78 (Big Tree Road) at a northbound entrance and southbound exit. North of here, entering the town of Elma, it turns to the west to meet with Maple Street at the final single-direction junction, a northbound entrance and southbound exit. The expressway then turns northwest to intersect with Jamison Road (formerly NY422) by way of a full diamond interchange. NY400 also passes a small industrial area containing manufacturing plants for Moog, Inc, Motorola, Servotronics, and Steuben Foods located on Maple Street and Jamison Road.
NY400 continues northwest, paralleling NY16 and NY78 on Seneca Street and becoming more suburban and heavily trafficked. On the Elma–West Seneca town line, a full cloverleaf interchange occurs with US20 and NY78 on Transit Road, just north of the Seneca Street/Transit Road intersection. The expressway turns in a more western direction here, as well, though there is still a slight deflection to the north.
The expressway continues to parallel NY16 (Seneca Street), now running between NY16 to the south and the North America Center industrial park to the north. The Norfolk Southern Railway separates NY400 from the industrial park. It intersects with NY277 (Union Road), again just north of the NY16 (Seneca Street) intersection with the road. After a final exit for NY16, it encounters the New York State Thruway (I-90) at the beginning of I-90's eight-lane section through Buffalo, signifying its high use during rush hour.
History
Construction began on the Aurora Expressway in the late 1960s and concluded in the early 1970s.[3] The entirety of the expressway, then incomplete, was designated as NY400 on January1, 1970.[2]
The intersection where NY400 terminates at NY16 in South Wales has been reconfigured over time. When the expressway was first constructed, the flow of traffic along Olean Road was unimpeded while traffic from NY400 was forced to merge with NY16 at a sharp angled intersection.[4][failed verification] The junction has since been altered so that southbound traffic on NY400 continues onto NY16 south with no merging required while commuters on NY16 north are guided onto the expressway rather than onto Olean Road. Olean Road, however, is still accessible by way of a four-way intersection with Richardson Road just west of the former junction.[5]
Exit list
The entire route is in Erie County. All exits are unnumbered.
