Beginning at 8 p.m. this evening, three eastbound lanes on the Blanchette Bridge will be closed.
The lanes will be re-opened by 5 a.m. on Sunday. At least two eastbound lanes will stay open to traffic throughout the weekend.
Linda Wilson Horn with the Missouri Department of Transportation says they do expect backups as motorists coming from St. Charles County try to get across the bridge.
“We are restriping the bridge to get ready for what will be a major impact starting two weekends from now," said Wilson Horn.
Illinois and Missouri officials appear to agree on a series of phased upgrades to the Poplar Street Bridge.
The plan would add a third eastbound I-64 lane over the bridge, as well as provide a two-lane onramp from northbound I-55.
MoDOT District Engineer Ed Hassinger says the $80 million in upgrades will go a long way toward smoothing the flow of traffic over the Mississippi.
St. Louis Public Radio is a service of the University of Missouri-St. Louis.