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King's Highway 400, commonly referred to as Highway 400, historically as the Toronto–Barrie Highway,nand colloquially as the 400, is a 400-series highway in the Canadian province of Ontario linking thencity of Toronto in the urban and agricultur...Full Wikipedia Topic
Highway ON-400 runs South to North with exit numbers starting at the southern most exit of each State/Province.
Start Terminus Maple Leaf Drive – Toronto(continues as Black Creek Drive)
Length 226.00 km/ 140.00 mi
End Terminus Highway 69 in Carling