Ontario Highway 404
highway in Ontario
King's Highway 404 (pronounced "four-oh-four"), also known as Highway 404 and colloquially as the four-oh-four, is a north–south 400-series highway in the Canadian province of Ontario. As the continuation of the municipal Don Valley Parkway (DVP) north of Highway 401, it connects Toronto with East Gwillimbury. The 50.1-kilometre (31.1 mi) controlled-access freeway also connects with Highway 407 in Markham and the Don Valley Parkway in North York and Toronto, which formed the northeastern ring road of the Greater Toronto Area until the opening of Highway 412 in 2016. Highway 404 provides access to the eastern edge of Richmond Hill, Aurora and Newmarket and the western edge of Whitchurch-Stouffville, in addition to the southern edge of Keswick.
Metro Toronto (Metro) completed the Don Valley Parkway (DVP) to Sheppard Avenue in 1966. Metro initially planned extension of the DVP to Steeles Avenue, northward the province would continue the route which was inaugurated as Highway 404. However, the province ending up decided that their new highway would also run south of Steeles, incorporating the existing segment of the Metro-built DVP between Sheppard and Highway 401. The first section south of Steeles opened in 1977, over what was formerly Woodbine Avenue. Over the next twelve years, the Ministry of Transportation of Ontario (MTO) undertook a continuous construction program to extend the highway to Davis Drive in Newmarket. This was completed on October 24, 1989.
Begin with the source’s own compact description: “Ontario Highway 404” is highway in Ontario. The dossier treats that line as a proposition to test through Ontario, Highway and highway, not as a finished interpretation.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Aug 12, 2026. The linked authority identifier is Q2872847. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2016, 1966, 1977 and 1989.
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This entry incorporates text from “Ontario Highway 404” 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.