The westbound lanes of Highway 401 from Iona Road to Colonel Talbot Road will be closed to traffic from tonight at 11:00 pm until tomorrow morning at 6:00 am for the installation of bridge girders at the Mill Road underpass.

Highway 401 westbound traffic will be rerouted via Colonel Talbot Road, Talbot Line and Iona Road with OPP assistance at intersections.

Highway 401 eastbound traffic will remain open with short term traffic delays during this period.

Major delays are expected.