Although all roads in the provincial highway network are under the name King's Highway,[3]
the term is primarily associated with the highways numbered 2 through 148, the 400-series highways and the Queen Elizabeth Way.
Backbone of the 400-series network; busiest highway in North America.[40] Scheduled for extension to American border following completion of the Gordie Howe International Bridge. Extended length will terminate at an interchange with I-75 on the bridge.
The following is a list of the unsigned 7000-series highways as of October 2020. This list is compiled using the official MTO Provincial Highway Network and MTO Jurisdiction datasets.[2][92][93]
^Shragge, John; Bagnato, Sharon (1984). From Footpaths to Freeways. Toronto: Ontario Ministry of Transportation and Communications, Historical Committee. pp. 74–75. ISBN978-0-7743-9388-1.
^"III – The Provincial Highway". Annual Report (Report). Department of Public Highways. February 26, 1918. pp. 13–14. Retrieved February 2, 2021 – via Internet Archive.
^ abcde"Report on Provincial Highways". Annual Report (Report). Department of Public Highways. March 31, 1921. pp. 40–45. Retrieved February 2, 2021 – via Internet Archive.
^"Appendix 4 - Schedule of Assumptions and Reversions". Annual Report (Report). Department of Highways. March 31, 1934. p. 37. Retrieved February 2, 2021 – via Internet Archives.
^ ab"Appendix F – Provincial Highways". Annual Report (Report). Department of Public Highways. March 31, 1919. p. 51. Retrieved February 2, 2021 – via Internet Archive.
^ abcd"Appendix No. 5 - Schedule of Assumptions and Reversions of Sections of the King's Highway System for the Years 1930 and 1931". Annual Report (Report). Department of Highways. March 31, 1932. pp. 76–78. Retrieved February 3, 2021 – via Internet Archive.
^ abcde"Appendix No. 6 - Schedule of Assumptions and Reversions of Sections of the Provincial Highway System for the Years 1926 and 1927". Annual Report (Report). Department of Highways. March 31, 1928. pp. 59–61. Retrieved February 3, 2021 – via Internet Archive.
^Ontario Road Map (Map). Cartography by D. Barclay. Ontario Department of Public Highways. 1928. Mileage Tables inset.
^"Appendix No. 4 - Schedule of Assumptions and Reversions of Sections of the King's Highway System for the Year 1932". Annual Report (Report). Department of Highways. March 31, 1933. p. 47. Retrieved February 3, 2021 – via Internet Archive.
^ ab"Appendix No. 4 - Schedule of Assumptions and Reversions of Sections of the King's Highway System for the Year 1934". Annual Report (Report). Department of Highways. March 31, 1935. pp. 119–120. Retrieved February 3, 2021 – via Internet Archive.
^ ab"Appendix No. 4 - Schedule of Assumptions and Reversions of Sections of the King's Highway System for the Year 1935". Annual Report (Report). Department of Highways. March 31, 1935. p. 49. Retrieved February 3, 2021 – via Internet Archive.
^ abcdefghijkl"Appendix No. 3 - Schedule of Assumptions and Reversions of Sections of the King's Highway System for the Year Ending March 31, 1938". Annual Report (Report). Department of Highways. March 31, 1938. pp. 80–81. Retrieved February 3, 2021 – via Internet Archive.
^ abcdefgA.A.D.T. Traffic Volumes 1955–1969 And Traffic Collision Data 1967–1969. Ontario Department of Highways. 1970.
^"Appendix No. 4 - Schedule of Assumptions and Reversions of Sections of the King's Highway System for the Year Ending March 31, 1937". Annual Report (Report). Department of Highways. March 31, 1937. p. 51. Retrieved February 3, 2021 – via Internet Archive.
^Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1938–39. § J7–K8.
^"Appendix No. 3 - Schedule of Assumptions and Reversions of Sections of the King's Highway System for the Year Ending March 31, 1939". Annual Report (Report). Department of Highways. March 31, 1939. p. 84. Retrieved February 3, 2021 – via Internet Archive.
^"Appendix No. 3 - Schedule of Assumptions and Reversions of Sections of the King's Highway System for the Year Ending March 31, 1941". Annual Report (Report). Department of Highways. March 31, 1941. p. 92. Retrieved February 3, 2021 – via Internet Archive.
^Ontario Road Map (Map). Cartography by Photogrammetry Office. Ontario Department of Highways. 1971. § L6.
^Ontario Road Map (Map). Cartography by Photogrammetry Office. Department of Transportation and Communications. 1972. § L6.
^"By Road". Red Lake Regional Heritage Centre. Retrieved February 3, 2021.
^ abOntario Department of Highways (March 31, 1958). "Appendix No. 3C - Schedule of Assumptions of Sections of the King's Highway System for the Fiscal Year Ending March 31, 1958". Annual Report (Report). pp. 241–244.
^Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1953. §§ J32–K33.
^Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1954. §§ J32–K33.
^Ontario Department of Highways (March 31, 1955). "Appendix No. 3C - Schedule of Plans Designating the King's Highways". Annual Report (Report). p. 164.
^ abcdefOntario Department of Highways (March 31, 1956). "Appendix No. 3 - Schedule of Assumptions of Sections of the King's Highway System for the Fiscal Year Ending March 31, 1957". Annual Report (Report). pp. 203–205.
^MacDonald-Cartier Freeway — Highway No. 401 (Map). Ontario Department of Highways. 1965.
^Canadian Press (October 6, 1972). "Highway 140 Opens". News. Globe and Mail. Vol. 129, no. 38, 324. Toronto. p. 5. Highway 140, a new six-mile highway running along the east side of the Welland Canal between [Welland] and Port Colborne, was opened Yesterday.
^"Provincial Highways: Eastern Region". Annual Report (Report). Ministry of Transportation and Communications. March 31, 1983. p. 18.
^Maier, Hanna (October 9, 2007). "Chapter 2". Long-Life Concrete Pavements in Europe and Canada (Report). Federal Highway Administration. Retrieved May 1, 2010. The key high-volume highways in Ontario are the 400-series highways in the southern part of the province. The most important of these is the 401, the busiest highway in North America, with average annual daily traffic (AADT) of more than 425,000 vehicles in 2004 and daily traffic sometimes exceeding 500,000 vehicles.
^Built Heritage, Cultural Landscape and Planning Section (January 2006). "2.0 Background History"(PDF). Heritage Impact Assessment: Christina Street Bridge over Highway 402, Sarnia (Report). Archaeological Services Inc. p. 4. Retrieved January 6, 2014.
^ abcAADT Traffic Volumes 1955–1969 and Traffic Collision Data 1967–1969. Ontario Department of Highways. 1970. pp. 11–12.
^Construction Program: King's and Secondary Highways (Report). Ministry of Transportation and Communications. 1976–77. p. XV.
^Mitchell, Bob (June 6, 1997). "At Last — Opening Bell Tolls for the 407". The Toronto Star. pp. A1, A6.
^"New Shortcut Will Let Some 'Fly' to Airport". Metro News. The Toronto Star. August 19, 1978. p. A6. Highway 409, a new shortcut to Toronto International Airport, opens next Friday
^Public and Safety Information Section (November 9, 1978). "Highway 410 Opens November 15" (Press release). Ministry of Transportation and Communications.
^"Extension of Ontario Hwy. 407, new Hwy. 418 open east of Toronto". On-Site. 9 December 2019. Retrieved December 11, 2019. An eastern extension of Ontario Hwy. 407 and a new toll road to connect the lengthened highway to nearby Hwy. 401 opened Dec. 9 on the outskirts of Toronto.
^ abcdefghijklmnopqrstuvwxyzaaabacadaeafag"Ontario Secondary Roads Now Designated 500, 600". Vol. 112, no. 33, 119. The Globe and Mail. February 4, 1956. p. 4. Two new Ontario road numbers appear on the province's 1956 official road map which will be ready for distribution next week. The new numbers are the 500 and 600 series and designate hundreds of miles of secondary roads which are wholly maintained by the Highways Department. More than 100 secondary roads will have their own numbers and signs this year. All of these secondary roads were taken into the province's main highways system because they form important connecting links with the King's Highways
^Ontario Road Map (Map). Cartography by Cartography Section. Ontario Department of Highways. 1981–82. §§ J4–5.
^Ontario Road Map (Map). Cartography by Cartography Section. Ontario Department of Highways. 1982–83. §§ J4–5.
^Ontario Road Map (Map). Cartography by Cartography Section. Ministry of Transportation and Communications. 1986–87. § M33.
^Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1961. §§ O31–32.
^Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1958. § M32.
^ abcOntario Department of Highways (March 31, 1964). "Appendix No. 3 - Schedule of Controlled Access Highways, Appendix No. 3A – Schedule of Assumptions of Sections". Annual Report (Report). pp. 267–269.
^Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1958. §§ L29–30.
^ abcdeOntario Department of Highways (March 31, 1961). "Appendix No. 3A - Schedule of Designations and Re-designations of Sections of the King's Highway and Secondary Highway Systems for the Fiscal Year Ending March 31, 1961". Annual Report (Report). pp. 237–242.
^Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1958. § N31.
^ abcdefgOntario Department of Highways (March 31, 1963). "Appendix No.3A - Schedule of Designation and Re-Designations of Sections of the King's Highway, Secondary Highway and Tertiary Road Systems for the Fiscal Year Ending March 31, 1963, and Appendix No. 3C – Schedule of Existing Roads Assumed as Portions of the King's Highway, Secondary Highway and Tertiary Road Systems for the Fiscal Year Ending March 31, 1963". Annual Report (Report). pp. 243, 299–302.
^ abOntario Department of Highways (March 31, 1959). "Appendix No. 3A – Schedule of designations and Re-designations of Sections of the King's Highway and Secondary Highway Systems for the Fiscal Year Ending March 31, 1959". Annual Report (Report). pp. 237–239.
^Ontario Department of Highways (March 31, 1959). "Cochrane". Annual Report (Report). p. 30.
^Ontario Department of Highways (March 31, 1960). "Appendix No. 3A – Schedule of Designations and Re-designations of Sections of the King's Highway and Secondary Highway Systems for the Fiscal Year Ending March 31, 1959". Annual Report (Report). pp. 237–239.
^"Ontario Hydro Shells Out $15,000 for 36-Hour Official Opening Party". News. The Globe and Mail. Vol. 123, no. 36, 385. Toronto. July 23, 1966. p. 1. After a cocktail party and elaborate luncheon in the Hydro cafeteria near the Little Long station, they crowded together on the gravel surface of the new Highway 807 to watch Highways Minister Charles MacNaughton cut a red, white and blue ribbon.
^Ontario Road Map (Map). Cartography by Cartography Section. Ministry of Transportation and Communications. 1977. §§ K12–L13.
^Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1964. §§ M–N27.
^Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1964. § F3.
^Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1964. § E9.
^ abOntario Department of Highways (March 31, 1965). "Appendix 21 – Schedule of designations and re-designations of sections of King's Highway, Secondary Highway and Tertiary Road Systems for the Fiscal Year Ending March 31, 1965". Annual Report (Report). pp. 297–301.
^ abOntario Department of Highways (March 31, 1966). "Appendix No. 21 – Schedule of Designations and Re-Designations of Sections of the King's Highway, Secondary Highway and Tertiary Road Systems for the Fiscal Year Ending March 31, 1966". Annual Report (Report). pp. 319–320.
^Ontario Department of Highways (March 31, 1967). "Appendix No. 23 – Schedule of Existing Roads Assumed as Portions of the King's Highway, Secondary Highway and Tertiary Road Systems for the Fiscal Year Ending March 31, 1967". Annual Report (Report). pp. 314–327.
^Canadian Press (October 23, 1985). "Devil Taken Off the Road". Ontario. Ottawa: The Citizen. p. A5. You have to understand. For people who take the Bible very literally, this is a real concern." - Merv Farrow; "Although Highway 658 becomes official Nov. 1...
^Ontario Department of Highways (March 31, 1968). "Appendix No. 21 – Schedule of Designations and Re-Designations of Portions of the King's Highway, Secondary Highway and Tertiary Road Systems for the Fiscal Year Ending March 31, 1968". Annual Report (Report). p. 336.
^Ontario Road Map (Map). Cartography by Photogrammetry Office. Department of Transportation and Communications. 1972. §§ J–K10.
^Ontario Road Map (Map). Cartography by Photogrammetry Office. Ministry of Transportation and Communications. 1973. §§ J–K10.
^Ontario Road Map (Map). Cartography by Cartography Section. Ministry of Transportation and Communications. 1977. § O11–12.
^Ontario Road Map (Map). Cartography by Cartography Section. Ministry of Transportation and Communications. 1978–79. § O11–12.
^Transportation Capital Branch (1989). "Provincial Highways Distance Table". Provincial Highways Distance Table: King's Secondary Highways and Tertiary Roads. Ministry of Transportation of Ontario: 109, 120. ISSN0825-5350.
^Ontario Road Map (Map). Cartography by Cartography Section. Ministry of Transportation. 1990–91. § O–P34.