New York State Route 400
State highway in Erie County, New York, US
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.
“New York State Route 400” enters the record as state highway in Erie County, New York, US. Crown Archives preserves that source wording while asking what York, State and Route can confirm, complicate or overturn.
Why this record matters
“New York State Route 400” is worth following because a concise public description often conceals a longer documentary argument. Here, York, State and Route provides the most credible route into that argument.
The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Dec 2, 2025. The linked authority identifier is Q2486801. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “New York State Route 400”, its source revision and the description used here.
- Expand the search: follow New York State Route 400 primary sources, New York State Route 400 archive and York research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “New York State Route 400”?
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- What physical evidence or contemporary plan supports the description?
Search terms from this dossier
This entry incorporates text from “New York State Route 400” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.