Click on any Secondary Highway route marker sign from the menu below to see a detailed history and a link to a route map of that highway, showing historical
re-routings and realignments. Most of the route maps are still under development and will be posted later. For all other Ontario Highways, please return to the
Main Highway List. Enjoy!
Photo at Right: Aerial view of the new Trent-Severn Waterway crossing on Hwy 507 at Buckhorn (1977)
(Photo courtesy of Ontario Ministry of Transportation - © King's Printer for Ontario, 1977)
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