The Illinois Department of Transportation is restricting Illinois 161 near Scott Air Force Base on an intermittent basis, the agency said.
The road is set be reduced at times to one lane at Silver Creek as work is planned to take place daily between 7 a.m. and 6 p.m., IDOT said.
Flaggers will be present to maintain two-way traffic through the area.
This work is necessary to paint the bridge and is expected to be completed by June, IDOT said.
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IDOT asked motorists to use caution, obey all warning signs and allow extra time when traveling through the work zone.