The Ontario Provincial Highway Network consists of all the roads in Ontario maintained by the Ministry of Transportation, including those designated as part of the King's Highway, secondary highways,
Highway 401
This marker assembly at an intersection with Highway 6 features junction crowns and trailblazer shields directing traffic to several highways, and illustrates the increasingly common use of shields in junction assemblies; the colours on the QEW arrow plate are inverted
Reassurance markers for the QEW and Highway 403 concurrency
A typical secondary highway with route marker
Ontario Highway 401
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King's Highway 401, commonly referred to as Highway 401 and officially known as the Macdonald–Cartier Freeway or colloquially referred to as the four-oh-one, is a 400-series highway in the Canadian pr
Ontario Provincial Highway Network
…secondary highways, and tertiary roads. Components of the system—comprising 16,900 kilometres (10,500 mi) of roads and 2,880 bridges—range in scale from Highway 401, the busiest highway in North America, to unpaved forestry and mining access roads. The longest highway, Highway 17, is nearly 2,000 kilometres (1,200…
Highway 401 looking west at split with Highway 402 in London.
Highway 401 eastbound express lanes at Weston Road. This section has a volume of over 500,000 vehicles per day during the summer months.
Different colours are used on the signs on Highway 401's collector-express system to avoid confusion. The express lanes use green signs and the collector lanes use blue.
At the freeway's widest point in Mississauga near Toronto Pearson Airport, on the eastbound express lanes approaching the Airport Basketweave