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Ontario Highway 401 Weather

1 in 5 Driving Accidents Are Weather Related

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Ontario Highway 401 Weather, Wind, & Radar Map

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About Ontario Highway 401

Ontario Highway 401, often referred to as Highway 401, is officially called the Mandonald-Cariter Freeway. It extends 828 km (514 mi) from Windsor to Toronto. Where Highway 401 passes through Toronto the busiest and widest highways in North America. In fact, at Hogg’s Hallow in Toronto Highway 41 is home to North America’s busiest multi-structure bridge. This highway is a major artery to the network of highways in the Great Lakes region connecting to U.S. cities in Michigan and New York.