Ontario Highway 402

Highway 402
Highway 402 highlighted in red
Route information
Maintained by Ministry of Transportation of Ontario
Length	102.5 km[1] (63.7 mi)
History	Planned: 1938 Designated: 1953 Completed: 1982
Major junctions
West end	I-69 / I-94 at Canada–United States border on Blue Water Bridge in Point Edward
Major intersections	Highway 40 – Sarnia  Highway 4 – London
East end	Highway 401 – London
Location
Country	Canada
Province	Ontario
Counties	Lambton, Middlesex
Major cities	Sarnia, London
Highway system
Ontario provincial highways Current Former 400-series
← Highway 401 → Highway 403

King's Highway 402, commonly referred to as Highway 402 and historically as the Blue Water Bridge Approach, is a 400-series highway in the Canadian province of Ontario that connects the Blue Water Bridge international crossing near Sarnia to Highway 401 in London. It is one of multiple trade links between Ontario and the Midwestern United States. It is four lanes for much of its length, though the approach to the Blue Water Bridge is six lanes.

Although Highway 402 was one of the original 400-series highways when it was designated in 1953, the freeway originally merged into Highway 7 near the present Highway 40 interchange in what was, at the time, Sarnia Township. In 1972, construction began to extend Highway 402 from Sarnia to Highway 401 near London thus creating a bypass to Highway 7; construction took over a decade. The final section of the extension, between Highway 81 and Highway 2, opened to traffic in 1982. The removal of an intersection at Front Street in Sarnia made the entire route a controlled-access highway.

Motorists crossing into Michigan at the western end have direct access to Interstate 69 (I-69) and Interstate 94 (I-94) into Port Huron; motorists crossing onto the Canadian side from the east end of I-69 and I-94 have access to Toronto via Highway 401, and onwards to Montreal via A-20 in Quebec. The only town along Highway 402 between Sarnia and London is Strathroy.

Since September 26, 2019, the speed limit is 110 km/h (68 mph) on most of its length,^[2] with the exceptions of the speed limit of 100 km/h (62 mph) in Sarnia and near the Highway 401 interchange.