History of King's Highway 40B:
King's Highway 40B served as a Business Route through Downtown Sarnia for almost 30 years. During the 1960s, a new bypass was built around Sarnia, which resulted in changes to the route of Highway 40 in the area. In 1965, Highway 40 was rerouted along the new Bypass. The old alignment of Highway 40 through Downtown Sarnia became Highway 40B. The business route followed Christina Street, Vidal Street and Front Street. In the 1970s, both Vidal Street and Brock Street were converted into one-way streets. Highway 40B northbound was rerouted via Brock Street around 1975 and the route via Christina Street was discontinued. Highway 40B returned to Front Street via London Road, at the northern terminus of the Vidal Street and Brock Street one-way street system. The emtire route of Highway 40B was apparently decommissioned in 1993, although the route was reportedly still signed intermittently along some streets until quite recently.
Additional Information About King's Highway 40B:
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