York Region, Simcoe County, Muskoka, Parry Sound District, Sudbury District (future)
Major cities
Toronto Vaughan Barrie Sudbury (future)
Towns
Parry Sound, Bradford, King
Highway system
Ontario provincial highways
Current
Former
400-series
← Highway 169
→ Highway 401
King's Highway 400, commonly referred to as Highway400, historically as the Toronto–Barrie Highway, and colloquially as the400, is a 400-series highway in the Canadian province of Ontario linking the city of Toronto in the urban and agricultural south of the province with the scenic and sparsely populated central and northern regions. The portion of the highway between Toronto and Lake Simcoe roughly traces the route of the Toronto Carrying-Place Trail, a historic trail between the Lower and Upper Great Lakes. North of Highway 12, in combination with Highway 69, it forms a branch of the Trans-Canada Highway (TCH), the Georgian Bay Route, and is part of the highest-capacity route from southern Ontario to the Canadian West, via a connection with the mainline of the TCH in Sudbury. The highway also serves as the primary route from Toronto to southern Georgian Bay and Muskoka, areas collectively known as cottage country. The highway is patrolled by the Ontario Provincial Police and has a speed limit of 100 km/h (62 mph), except for the section south of Highway401, where the speed limit is 80 km/h (50 mph).
It was the first fully controlled-access highway in Ontario when it was opened between North York and Barrie on July1, 1952. On that date, it was also the first highway to be designated as a 400-series. The freeway was extended in both directions; north of Barrie to Coldwater in 1958, and south of Highway401 to Jane Street in 1966; a short distance east of Jane Street the route continues as the municipal expressway Black Creek Drive which opened in 1982. Since the 1970s to the present there have been numerous projects which have widened and modernized the freeway between North York and Barrie, including being expanded with a collector-express system in Vaughan to accommodate the interchange with the new Highway407 ETR.
Highway400 is the second longest freeway in the province, the trans-provincial Highway 401 being the longest. Since 1977, construction on the freeway has been snaking north along Highway69 towards Parry Sound and Sudbury. As of 2011, a four lane freeway is opened as far north as Carling; at that point, the four lanes narrow into two and continue northerly to Sudbury as Highway69. At the north end of Highway69, a segment of freeway is in operation from near Highway 522 south of the French River to Sudbury; while this section will be part of the completed Highway400 route, at present it remains signed as Highway69. The remaining gap between Carling and Highway 522 will be opened in stages as construction is undertaken and completed.[4]
^"Toronto–Barrie Highway". The Maple Leaf. October 2, 1944. Retrieved June 23, 2015.
^Ministry of Transportation of Ontario (2016). "Annual Average Daily Traffic (AADT) counts". Government of Ontario. Retrieved October 3, 2021.
^Shragge & Bagnato 1984, pp. 89–92.
^Carmichael, Harold (March 7, 2015). "Highway 69 to be delayed, province admits". Sudbury Star. Retrieved August 7, 2016.
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Global Information
Highway 401 – Toronto
407 ETR – Vaughan
Highway 11 – Barrie
Highway 12 – Waubaushene
Highway 124 – Parry Sound
Highway 69 – Carling
