JaMissouri Department of Transportation (MoDOT) workers have started construction of the passing lane project between Thayer and West Plains.
According to MoDOT officials, excavation work will start just south of Koshkonong and "shoulder-work-ahead" signs will be in place.
This is a $5.2 million project and will include 25.42 miles of Highway 63 between Highway 19 in Thayer and Highway ZZ south of West Plains.
The project will allow for three lanes of traffic in the widened areas and one lane alternating from one side of the road to the other. MoDOT officials said on the side of the road where two lanes of traffic are moving in one direction, vehicles will be able to pass slower moving traffic.
No lane closings are expected during the project. Crews and equipment are expected to be located behind guardrails and not on the shoulder of the road.
Paving is scheduled to begin in mid-to-late summer and (weather permitting) the project is scheduled to be completed by November.
The passing lane project has been awarded to Chester Bros. Construction, of Hannibal, Mo., at $2.2 million under the original estimated cost.