The Washington State Department of Transportation says repair work is complete on a portion of U.S. Highway 2 at Stevens Pass after it was damaged in December.
The section between the summit and Coles Corner is now open without pilot vehicles.
Repair work began on December 18 when flooding washed out part of the road, causing it to sink.
During repairs, only two lanes remain on Stevens Pass.
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Despite reopening, US 2 near Tumwater Canyon remains closed from Coles Corner to Leavenworth.
Chumstick Highway is a closed detour.
Motorways have lower speed limits and bridge restrictions, which can result in longer travel times.
Repairs on the Chumstick Highway are scheduled for next week, which could impact travel in the area.
Drivers are asked to check road conditions before passing the pass and prepare for winter road conditions.