Bridge demolition is scheduled through London at Dingman Drive Saturday night.
The Ministry of Transportation says all lanes of the 401 will be closed between Wonderland Drive and Wellington Road.
It's set to begin at 8 p.m. Saturday, August 21, reopening at 10 a.m. Sunday, August 22.
Eastbound lanes of Highway 402 will also be closed in the same area, at the same time.
On-ramps to both Wonderland Road and Wellington Road will be blocked as well, with detour signage posted.
Westbound traffic will be rerouted via Wellington Road, Manning Drive and Wonderland Road.
Eastbound drivers will take Wonderland Road, Manning Drive and Wellington Road, too.
MTO says heavy traffic delays are expected.
Overnight closure of Highway 401 through London happening Saturday to Sunday this weekend - all lanes between Wonderland Road and Wellington Road will be closed from 8 p.m. Aug. 21 to 10 a.m. Aug. 22. pic.twitter.com/wR6Jxf2kk0— Maddie Demarte (@maddiedemarte) August 18, 2021