Hwy 40A Hwy 40A Hwy 40A   

Ontario Highway 40A Quick Facts:
  • Years in Existence: 1963-1965
  • Current Status: Renumbered as King's Highway 40 in 1965
  • Current Names: King's Highway 40
  • Location: Southern Ontario
  • Counties Served: Lambton
  • Towns Served: Sarnia
  • Southern Terminus: Hwy 40 - Sarnia
  • Northern Terminus: Hwy 7 - Sarnia
  • Length in 1965: 12.1 km / 7.5 miles
HWY 40A
King's Highway 40A Sign
Image courtesy of Jamie Malecki

History of King's Highway 40A:

King's Highway 40A was a temporary designation assigned to the Sarnia Bypass in the 1960s. Construction began on the new Sarnia Bypass in 1963, following the assumption of Churchill Road and Modeland Road as a new provincial highway on May 1, 1963. The new Sarnia Bypass was completed and officially opened to traffic on October 25, 1963. Initially, the Sarnia Bypass was designated as Highway 40A, but it was later renumbered as Highway 40 two years after the route was completed. In 1965, Highway 40 assumed the entire route of Highway 40A along the new Sarnia Bypass. The Highway 40A designation was permanently retired.





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