The Highway 401 expansion project consists of an approximately 18-kilometre-long stretch within the western part of the Greater Toronto Area, from the Credit River in Mississauga to Regional Road 25 in Milton. This portion of highway feeds into the northwest corner of Toronto, passing by Pearson International Airport before stretching across the top of the city heading east. The Expansion project will create: 12 lane core-collector system from the Credit River to Winston Churchill Boulevard; 10 lanes from Winston Churchill Boulevard to Highway 407 ETR/ Highway 401 interchange; 12 lane core-collector system from Highway 407 ETR/ Highway 401 interchange to east of the James Snow Parkway; 10 lanes from the James Snow Parkway to west of Regional Road 25; median HOV lanes; and support facilities and features—drainage, lighting, signage, ATMS, carpool lots, etc.
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