KSDK -- MoDOT will close Interstate 70 this weekend to knock down the Madison Street bridge over the interstate.
The department will close the interstate, and all ramps, between the Poplar Street Bridge and St. Louis Avenue. This work is not weather-dependent.
MoDOT will start reducing lanes and closing ramps on I-70 starting at 7 p.m. Friday, March 5, and will completely close the interstate at 8 p.m. The interstate and ramps will be completely open by 5 a.m. Monday, March 8.
I-70 was shut down last month so demolition crews could tear down the Cass Avenue Bridge.
To get around the interstate closure, eastbound drivers must use a combination of 10th and 11th Streets, Cole Street, South Broadway Street, Chestnut Street and Memorial Drive. Westbound drivers will use a combination of Memorial Drive, Washington Avenue, North Broadway, North Market and 10th Street.
The detour around the work will be marked. However, since much of the detour is on roads with signals, MoDOT said drivers should make every effort to avoid the area, if possible, using I-70 between I-170 and I-64 for local traffic only.
Missouri River Bridge Director for MoDOT Greg Horn said delays last time the interstate was closed was about 20 to 30 minutes, but it could be worse if people don't avoid the area.
"If you are going downtown this weekend, don't take Highway 70," Horn said. "You'll be stuck in traffic."
An estimated 70,000 vehicles travel on I-70 through downtown St. Louis each weekend.