Illinois 203 lane closures in St. Clair County to begin May 11

MADISON – The Illinois Department of Transportation today announced that road repairs on Illinois 203 between Collinsville Road and the Madison County line in St. Clair County will require daily lane closures beginning, weather permitting, Monday, May 11. The closures will affect both northbound and southbound lanes.

Motorists should expect delays and are encouraged to use alternate routes during the closure. Drivers are urged to reduce speed, remain alert for changing conditions, obey all construction signage, and refrain from using mobile devices while approaching and traveling through the work zone.

The project is expected to be completed by early summer 2026.

For IDOT District 8 updates, follow us on the social media platform X at @IDOTDistrict8 or view area construction details on IDOT’s traveler information map on GettingAroundIllinois.com.