Denver ? Thousands of travelers heading to ski areas for the holiday weekend were stalled by giant traffic jams Saturday as highways were blocked by crews removing snow slides.

One avalanche at Berthoud Pass on U.S. 40, the main road to the Winter Park ski resort, knocked a state maintenance vehicle off the road during the night, said Colorado Department of Transportation spokeswoman Stacey Stegman. The pass reopened Saturday afternoon.

That pass was the scene of an avalanche last month that knocked two vehicles off the road and stranded several motorists. No injuries were reported because of snow slides or avalanche mitigation.

Elsewhere, avalanche crews firing explosive charges to break up potential avalanches dislodged a massive slide that buried Interstate 70, the main access from Denver and the urban Front Range corridor to many of the state’s major ski resorts, including Vail and Aspen.

“We’ve just gotten so much snow up there in the last two days,” Stegman said. “This is one of the biggest ski weekends of the year. We would love to keep the highway open. It’s just so much snow.”

By the time officials reopened I-70 shortly after 10 a.m., the traffic jam stretched east for 10 miles, Stegman said.

The storm, which had moved out of the state Saturday, piled up as much as 18 inches of snow in the mountains, Stegman said.

The storm also blasted the metropolitan area with wind as high as 100 mph. At Denver International Airport, officials were still “baffled” Saturday by cracks that formed during the storm in the windshields of 12 airliners, airport spokesman Steve Snyder said.

Investigators had found no evidence of wind-blown debris that could have caused the cracks, which delayed some flights, Snyder said. No emergencies were declared and no injuries were reported.

Elsewhere, a twin-engine Cessna crashed during a snowstorm southeast of the airport at Council Bluffs, Iowa, killing at least three people late Friday, officials said. The cause of the crash was not yet known.