Drivers can expect slow going in the Spokane Valley, as crews put fresh asphalt on Interstate 90.
Tie-ups will last at least four weeks, while crews for Acme Materials and Construction Co. are working between Pines Road and the Idaho border.
Starting Wednesday, traffic will be reduced to a single lane eastbound, said Al Gilson, spokesman for the state Department of Transportation.
Once that lane is resurfaced, crews will move to the right lane of westbound traffic, then to the left lane eastbound and, finally, the left lane westbound.
Off- and on-ramps will be closed at times, Gilson said.
The $1.3 million project will remove ruts that engineers say were caused by studded tires and heavy traffic.
The 10-mile section of I-90 last was paved in 1991. The asphalt, a special mix designed to reduce road spray, lasted only about half as long as expected. The mix no longer is used in Washington.
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