History of King's Highway 7B (Thornhill):
The Thornhill Business route was created when Highway 7 was rerouted in 1963. The old alignment of Highway 7 along Centre Street from Bathurst Street to
Yonge Street (Highway 11) became Highway 7B. During the 1970s, the routing of Highway 7B was shortened. Rather than return to Highway 7 via Yonge Street,
the highway was truncated at its junction with Highway 11 in downtown Thornhill. This took place sometime between 1970 and 1977, but the exact year is not
known. In 1987, a new route for Highway 7 was completed between Bathurst Street and Concord. This new highway bypassed an even greater portion of Centre
Street. The Thornhill route of Highway 7B was decommissioned in 1987.
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