History of King's Highway 11B (Powassan):
The actual existence of Highway 11B through Powassan has not yet been confirmed. However, it is believed that the old route of Highway 11 through Downtown Powassan may have been signed as Highway 11B for a number of years after the Powassan Bypass opened to traffic in 1956. Jurisdiction over Old Highway 11/Highway 11B through Powassan was turned over from the Department of Highways of Ontario (DHO) to the Town of Powassan and the Township of South Himsworth, effective April 1, 1962. Interestingly, the Official Ontario Road Map continued to show the old route of Highway 11 through Powassan as a provincial highway up until 1967. This was apparently a mere cartographic error, as the DHO Mileage Logs from the mid-1960s indicate that the former route of Highway 11 through Powassan was a municipal road by that time. The old highway through Powassan is now known as Main Street.