Summer road construction season is kicking into full gear and one of the biggest projects is starting today on Interstate 80 in western Iowa. Bob Jimmerson, with the Iowa Department of Transportation, says they’ve closed a four mile stretch of the eastbound lanes from the Cass County line into Adair County. The head-to-head traffic pattern will exist for most of the summer.

Jimmerson says the D.O.T. is replacing a bridge, meaning the eastbound lanes will likely be closed through the end of August. The westbound bridge will be replaced next summer. Jimmerson says another bridge replacement project in Cass County will bring more head-to-head traffic on I-80 soon.

"Sometime in June, we’ll have a head-to-head situation near the Highway 71 and Interstate 80 interchange. We’re going to replace two bridges in the westbound lanes," Jimmerson said.

The biggest road construction project affecting traffic in western Iowa right now involves the closure of one lane on westbound I-80 in Johnson County. In northern Iowa, a resurfacing project will affect travel over a seven mile stretch of Interstate 35 until September. The D.O.T. has closed one lane in both directions of I-35 through Hamilton and Wright Counties.