Drivers who use the westbound I-255 Jefferson Barracks Bridge across the Mississippi River need to determine alternate routes through at least the end of the week, as the westbound interstate bridge will remain closed. Update on westbound I-255 closure at the Jefferson Barracks bridge in St. Louis

Currently, highly specialized inspection teams are looking at the bridge during daylight hours (about 6 a.m. to 6:30 p.m.) to determine any other potential places where there may be similar issues on the bridge. MoDOT brought in equipment from Chicago and Jefferson City, and has flown in an additional specialist from Seattle.

Due to the nature and precision of the inspection, the work needs to be done in daylight. At this point, the inspection is anticipated to be complete Wednesday, at which point the department will be able to share further information on a timeline for the needed repairs.

MoDOT continues to coordinate with various partners, including the Illinois Department of Transportation, emergency responders, and local construction teams to mitigate the situation, determine a repair and get the bridge open to traffic as soon as safely possible.

Monday morning’s rush period saw a large number of vehicles on Illinois Route 3 and on the westbound I-64 across the Poplar Street Bridge. There was a slight increase in traffic on the I-70 Stan Musial Bridge, and no change in traffic on the westbound I-270 Chain of Rocks Bridge.

Travelers should consider using other Mississippi River crossings and shifting their drive times. The Illinois DOT has increased staff on hand to update signs and adjust signal timing.

Drivers who hold an oversize/overweight permit that includes the I-255 bridge in the route MUST OBTAIN A NEW PERMIT. Call MoDOT Motor Carrier Services at 1-866-831-6277 between 7:30 am and 4:30 pm or log in to the online system, MoDOT Carrier Express at

Subscribe to MoDOT Motor Carrier Services incident notices at