The Provincial Highway Network consists of all the roads in Ontario maintained by the Ministry of Transportation of Ontario (MTO), including those designated as part of the King's Highway, 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 is nearly 2,000 kilometres (1,200 mi) long, while the shortest is less than a kilometre. Some roads are unsigned highways, lacking signage to indicate their maintenance by the MTO; these may be remnants of highways that are still under provincial control whose designations were decommissioned, roadway segments left over from realignment projects, or proposed highway corridors.
King's Highway 3, commonly referred to as Highway 3, is a provincially maintained highway in the Canadian province of Ontario which travels parallel to the northern shoreline of Lake Erie. It has three segments, the first of which travels from the Ambassador Bridge in Windsor to Highway 77 in Leamington. The second portion begins at Talbotville Royal outside of St. Thomas at Highway 4, and travels to the western city limits of Port Colborne. The road is regionally maintained within Port Colborne as Niagara Regional Road 3, but regains its provincial designation at Highway 140. Its third and final terminus is at Edgewood Park, within the Fort Erie town limits. From there, the road continues as Niagara Regional Road 3 to the Peace Bridge, where drivers can cross to the United States. The total length of Highway 3 is 258.2 km (160.4 mi), consisting of 49.2 km (30.6 mi) from Windsor to Leamington, 187.9 km (116.8 mi) from Talbotville Royal to Port Colborne and 21.1 km (13.1 mi) from Port Colborne to Edgewood Park.
King's Highway 17, more commonly known as Highway 17, is a provincially maintained highway and the primary route of the Trans-Canada Highway through the Canadian province of Ontario. It begins at the Manitoba boundary, 50 km (31 mi) west of Kenora, and the main section ends where Highway 417 begins just west of Arnprior. A small disconnected signed section of the highway still remains within the Ottawa Region between County Road 29 and Grants Side Road. This makes it Ontario's longest highway.
Secondary Highway 638, commonly referred to as Highway 638, is a provincially maintained secondary highway located in the District of Algoma in the Canadian province of Ontario. The route begins at Highway 17B in Echo Bay and travels eastward to Ophir, where it turns south to Bruce Mines, ending 1.1 km (0.7 mi) north of Highway 17. The north–south portion of the route was designated in 1956 as Highway 561. In 1962, Highway 638 was designated from Echo Bay to Highway 561, as well as a segment of the latter route from Ophir to Dunns Valley. The highway took on its current routing in 1989, assuming the route of Highway 561 south from Ophir to Bruce Mines; the section of Highway 638 from Ophir to Dunns Valley was renumbered as Highway 670.
The Ministry of Transportation (MTO) is the provincial ministry of the Government of Ontario that is responsible for transport infrastructure and related law in Ontario, Canada. The ministry traces its roots back over a century to the 1890s, when the province began training Provincial Road Building Instructors. In 1916, the Department of Public Highways of Ontario (DPHO) was formed and tasked with establishing a network of provincial highways. The first was designated in 1918, and by the summer of 1925, sixteen highways were numbered. In the mid-1920s, a new Department of Northern Development (DND) was created to manage infrastructure improvements in northern Ontario; it merged with the Department of Highways of Ontario (DHO) on April 1, 1937. In 1971, the Department of Highways took on responsibility for Communications and in 1972 was reorganized as the Ministry of Transportation and Communications (MTC), which then became the Ministry of Transportation in 1987.
King's Highway 50, commonly referred to as Highway 50, was a provincially maintained highway in the Canadian province of Ontario. The highway, which was decommissioned in 1998, is still referred to as Highway 50, though it is now made up of several county and regional roads: Peel Regional Road 50, York Regional Road 24 and Simcoe County Road 50. The route began in the north end corner of the former Etobicoke at Highway 27 as Albion Road, and travelled northwest to Highway 89 west of the town of Alliston. En route, it passed through the villages of Bolton, Palgrave and Loretto. The road south of Bolton has become more suburban as development has encroached from the east and west; but despite this increased urbanization, the removal of highway status, and the fact that it runs through the former Albion Township, the Albion Road name has not been extended to follow it outside Toronto.
King's Highway 5, commonly referred to as Highway 5 and historically as the Dundas Highway and Governor's Road, is a provincially maintained highway in the Canadian province of Ontario. The east–west highway travels a distance of 12.7 km (7.9 mi) between Highway 8 at Peters Corners, north of Hamilton, and Highway 6 at Clappison's Corners. Prior to several sections being downloaded to the municipalities in which they were located, Highway 5 served as bypass to Highway 2, connecting with it in both Paris and Toronto, a distance of 114.3 km (71.0 mi).
King's Highway 24, commonly referred to as Highway 24, is a highway in the Canadian province of Ontario that currently begins at Highway 3 in Simcoe, and ends at the southern city limits of Cambridge. The south–north route travels through Brantford, as well as the community of Scotland. Outside of those communities, Highway 24 travels through a predominantly agricultural area.
Secondary Highway 537, commonly referred to as Highway 537, is a provincially maintained secondary highway in the Canadian province of Ontario. The highway is 16.1 kilometres (10.0 mi) in length, connecting Highway 69 near Wanup with Finni Road. It once continued 3.6 km (2.2 mi) further to intersect Highway 17 in Wahnapitae, but was truncated in 1998; this portion of the route is now designated as Greater Sudbury Municipal Road 537. Highway 537 is now the only secondary highway in the province located within a jurisdiction that also maintains its own county/regional road network.
King's Highway 28, commonly referred to as Highway 28, is a provincially maintained highway in the Canadian province of Ontario. The southwest–northeast route extends from Highway 7 east of Peterborough, to Highway 41 in Denbigh. The route passes over undulating hills before entering the Canadian Shield near Burleigh Falls, and gradually turns eastward.
King's Highway 62, commonly referred to as Highway 62, is a provincially maintained highway in the Canadian province of Ontario. The highway travels south–north from Highway 33 at Bloomfield in Prince Edward County, through Belleville, Madoc and Bancroft, to Maynooth, where it ends at a junction with Highway 127. Prior to 1997, the route continued north and east of Maynooth through Cobermere, Barry's Bay, Killaloe, Round Lake and Bonnechere to Highway 17 in Pembroke. This section of highway was redesignated Hastings Highlands Municipal Road 62, Renfrew County Road 62, and Renfrew County Road 58.
King's Highway 49, commonly referred to as Highway 49, is a provincially maintained highway in the Canadian province of Ontario. The 5.8-kilometre (3.6 mi) highway travels across the Quinte Skyway and through the Tyendinaga Mohawk Territory south of Marysville.
King's Highway 3B, commonly referred to as Highway 3B, was a provincially maintained highway within Windsor, in the Canadian province of Ontario. Its purpose was to link Highway 3 and Highway 401 with the Detroit–Windsor Tunnel and downtown Windsor. Highway 3B was routed along the city streets of Ouellette Avenue, Ouellette Place, Howard Avenue, and Dougall Avenue, and the short freeway of Dougall Parkway.
Highway 131 was a provincially maintained highway in the Canadian province of Ontario, located in Simcoe County and the city of Barrie. The route, which connected Highway 27 with Highway 90, existed from 1984 until 1998, after which it was transferred to the responsibility of Simcoe County. Highway 131 was a straight rural highway, located west of Barrie's suburban fringe, though since then those suburbs have grown out to reach the former highway. Otherwise, the highway is abutted by the occasional farm and surrounded by several forests.
Highway 17B was formerly the designation for six business routes of Highway 17, the main route of the Trans-Canada Highway through the Canadian province of Ontario. Each generally followed the original route of Highway 17 through the town or city that it served, and was subsequently given the Highway 17B designation when a newer bypass route was constructed to either reduce traffic pressure on the local street network, or provide a better thoroughfare that avoided urban areas altogether.
Secondary Highway 503, commonly referred to as Highway 503, was a provincially maintained secondary highway in the Canadian province of Ontario. The 116.8 km (72.6 mi) route existed between 1956 and 1998. Between 1956 and 1963, the highway stretched from Kirkfield to Sebright, and then along the Monck Road from Sebright to Kinmount, entirely within Victoria County. In 1964, the route was extended to Highway 121 in Tory Hill along the route of Highway 500 through the counties of Peterborough and Haliburton. In 1998, the route was transferred to the various counties in which it resided. Today it is known as Kawartha Lakes City Road 6 and 45, Peterborough County Road 503 and Haliburton County Road 503.
King's Highway 80, commonly referred to as Highway 80, was a provincially maintained highway in the Canadian province of Ontario. It travelled in an east–west direction south of Sarnia from Courtright to Strathburn. Beginning at the St. Clair Parkway near the shores of the St. Clair River, the route travelled 69.6 kilometres (43.2 mi), intersecting Highway 40, Highway 21 and Highway 79 before ending at Highway 2. In addition to the towns at either terminus, Highway 80 serviced the communities of Brigden, Glencoe and Alvinston. The entire route was and remains two lanes wide.
Secondary Highway 610, commonly referred to as Highway 610, was a provincially maintained secondary highway in the Canadian province of Ontario that connected Highway 101 at Hoyle, east of Timmins, with former Highway 67 near Barbers Bay, passing through the village of Connaught en route. Highway 610 was assumed by the Department of Highways, predecessor to the modern Ministry of Transportation of Ontario, in 1956, along with many of the secondary highways in Ontario. It remained unchanged between then and 1997, when it was decommissioned and transferred to the CIty of Timmins. The entire route is now known as Frederick House Lake Road.
King's Highway 76, commonly referred to as Highway 76, was a provincially maintained highway in the Canadian province of Ontario. The route began at Highway 3 in Eagle and progressed north through the community of West Lorne, encountering Highway 401 immediately before terminating southwest of Glencoe at Longwoods Road. Today the route it followed is known as Elgin County Road 76 and Middlesex County Road 76.
