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Ontario Road Conditions - 400 Numbered Highways

400 Level Highways including QEW

Hwy 400 Hwy 402 Hwy 405 Hwy 409 Hwy 417
Hwy 401 Hwy 403 Hwy 406 Hwy 410 QEW
Hwy 402 Hwy 404 Hwy 407 Hwy 416 Hwy 427
The 400-series highways are a network of controlled-access freeways throughout the southern portion of the province of Ontario, forming a special series of the Ontario provincial highway system. The province's baseline standard for the construction of a 400-series highway (or any controlled-access freeway in Ontario) is an average traffic count of 10,000 vehicles per day. However, other factors are considered as well. The "400-series" numbers were first introduced to designate the province's controlled-access highways. The "4" was intended to reflect that these were four-lane roads, although portions of these highways subsequently exceeded four lanes. Although the Queen Elizabeth Way has no posted highway number, it is considered to be part of the 400-series highway network. The QEW was the first of the controlled-access highways to be constructed.