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Provincial Highway 401, also known by its official name of the Macdonald-Cartier Freeway and colloquially as the four-oh-one, is a freeway in the Canadian province of Ontario, stretching from Windsor to the Quebec border. The segment of Highway ...Full Wikipedia Topic
Start Terminus Highway 3 to Windsor
Length 817.90 km/ 508.20 mi
End Terminus A-20 towards Montreal, QC
Highway ON-401 runs West to East with exit numbers starting at the western most exit of each State/Province..
For exit details, click on green exit sign.