The Washington State Transportation Department says westbound traffic is again moving along Interstate 90 at Snoqualmie Pass after rocks rolled down a slope and were hit by three vehicles.WSDOT spokeswoman Meagan Lott says one westbound lane reopened Tuesday afternoon. She says a geotechnical expert judged the area sufficiently stable with the addition of a concrete barrier to deflect any new falling rocks.

The rocks that came down before 5 a.m. Tuesday were struck by two trucks and an SUV. The Washington State Patrol reported one man in the SUV was treated for a minor injury.

Transportation officials say the slope had been blasted and bolted in an attempt to improve stability.
Eastbound traffic was not affected.