Traffic shifts planned for eastbound I-70 near Warrenton

August 20, eastbound Interstate 70 traffic shifts are planned in Warren County, at Warrenton between Warrenton Blvd/Route MM to east of the Missouri Route 47 Interchange (mile marker 191.4 – 193.2) as work continues on the Improve I-70: Warrenton to Wentzville project. Traffic will shift onto the newly constructed pavement and existing driving lane to allow crews to construct the permanent passing lane and left shoulder. To complete the traffic switch, an extended overnight left-lane closure will occur from 7:00 p.m. on Thursday, August 20 through 2:00 p.m. on Friday, August 21 to allow for the repositioning of barrier wall.

After the traffic switch occurs, motorists can expect the following traffic conditions and impacts through Spring of 2027:

• Traffic barriers will be in place along the left shoulders of eastbound and westbound I-70 for this area.
• Two lanes of traffic will be maintained on I-70 during peak travel times and the speed limit will remain 55 mph throughout the work zone.
• Eastbound I-70 will be reduced to one lane during nighttime hours of 7 p.m. to 7 a.m.  All eastbound lanes will continue to be narrowed.
• Westbound I-70 may have intermittent left lane closures during nighttime hours of 7 p.m. to 7 a.m.

Motorists are encouraged to pay attention in work zones, drive the posted work zone speed limit, and allow extra time for travel. All work is weather-dependent, and schedules are subject to change.