Ontario Highway 3B

King's Highway 3B marker
King's Highway 3B
Ouellette Ave. looking north (2231009913).jpg
View looking north on Ouellette Avenue, a former part of Highway 3B
Route information
Maintained by City of Windsor
Length11 km[citation needed] (6.8 mi)
Existed1935–1998
Location
CountryCanada
ProvinceOntario
CountiesEssex
Highway system
Highway 3 Highway 4

King's Highway 3B, commonly referred to as Highway 3B, was a provincially maintained highway within Windsor, in the Canadian province of Ontario. Its purpose was to link Highway 3 and Highway 401 with the Detroit–Windsor tunnel and downtown Windsor. Highway 3B was routed along the city streets of Ouellette Avenue, Ouellette Place, Howard Avenue, and Dougall Avenue.