Eastbound and westbound lanes of Highway 401 from Iona Road to Colonel Talbot Road will be fully closed to traffic starting Saturday, July 20 at 9:00 P.M. until Sunday, July 21 at 9:00 A.M. for the demolition of the west half of the Union Road Underpass.


During this closure, Union Road will also be closed from Third Line to Fourth Line with no access to Highway 401 at this location.


Highway 401 traffic will be rerouted via Iona Road, Talbot Line and Colonel Talbot Road with OPP assistance at intersections (see detour map below). It’s recommended to avoid the area as heavy delays are expected.