Jefferson County, Mo (KSDK) -- Northbound and southbound I-55 in Jefferson County will be reduced to one lane while crews install guardrails and guard cables.
The roadwork will be from Route 67 at Festus to the Ste. Genevieve County line.
Work will be performed Tuesday, May 1 through Thursday, May 24 from 7 a.m. to 6 p.m. daily, weather permitting.
The work zone will be marked with signs.
Motorists are urged to use extreme caution while traveling near the area.