Ontario Highway 18A
Highway 18A (in thick blue) as it appeared in the 1938–39 Ontario Road Map
|Auxiliary route of Highway 18|
|Length:||31.1 km (19.3 mi)|
|Existed:||April 13, 1938 – 1979|
|West end:||Highway 18 in Malden Center|
|East end:||Highway 18 in Kingsville|
|Towns:||Malden Center, Colechester, Kingsville|
King's Highway 18A, commonly referred to as Highway 18A, was a provincially maintained highway in the Canadian province of Ontario which was the southernmost provincial highway to ever exist in Canada. Since 1979, the entire route has been known as Essex County Road 50. The route began and ended at Highway 18, looping through Colchester.
Highway 18A was a short looping route that served the short headland that protrudes into Lake Erie between Amherstburg and Kingsville in the southernmost part of Essex County. It began and ended at junctions with the former Highway 18, now Essex County Road 20, that are approximately 25.8 kilometres (16.0 mi) apart on that road. The route itself is 31.1 kilometres (19.3 mi) long, detouring to the south along the shore of Lake Erie and passing through Colchester.
Highway 18A was first assigned during the late 1930s. The route remained consistent until its decommissioning during the late 1970s. It is now designated as Essex County Road 50 along its entirety and as Heritage Road east of Colchester. The highway was assumed by the Department of Highways on April 13, 1938. In 1979, the highway was transferred in its entirety to Essex County. Today, the route is known as Essex County Road 50.
The following table lists the major junctions along Highway 18A, as noted by the Ontario Department of Highways. The entire route was located in Essex County. The route is documented as it existed in 1970.
|Malden Centre||0.0||0.0||Highway 18 – Amherstburg, Windsor||Now County Road 20|
|Colchester||12.9||8.0||County Road 13 north (Erie Road) – Harrow|
|Kingsville||31.1||19.3||Highway 18 – Leamington||Now County Road 20|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- Ontario Road Map (Map). Cartography by C.P. Robins. Ontario Department of Highways. 1962. § Mileage Tables.
- Google (July 29, 2011). "Highway 18 / Essex County Road 20 route between the termini of Highway 18A / Essex County Road 50" (Map). Google Maps. Google. Retrieved July 29, 2011.
- Ontario Back Road Atlas (Map). Cartography by MapArt. Peter Heiler. 2010. p. 4. § E1–F4. ISBN 978-1-55198-226-7.
- "Appendix 3 - Schedule of Assumptions and Reversions of Sections". Annual Report (Report). Department of Highways. March 31, 1939. p. 84.
- A.A.D.T. Traffic Volumes 1955–1969 And Traffic Collision Data 1967–1969. Ontario Department of Highways. 1970. p. 63.