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Derek Petersen, Deseret News
A semitrailer carrying cattle tipped on the eastbound I-84 bridge over I-15, causing major delays on both interstates on Wednesday, Nov. 22, 2017.

RIVERDALE, Weber County — A trailer full of cattle tipped over and caused major delays in Riverdale, spilling black cows on to the freeway and sending at least one flying into cars.

Kerri Kofoed said she was driving south on I-15 in the left lane Wednesday when "a big black blob came flying at the windshield." Her car slammed into the median wall and started spinning forward, driving over the cow before finally coming to a stop, she said.

Several other cattle landed right behind her car. Kofoed said she felt "major gratitude that just one cow hit me and that it didn't bust through the windshield."

The spill left some animals dead in the road and others waiting to be rescued near the median. It also snarled traffic on I-15 and I-84 as holiday travel picked up before Thanksgiving.

The accident temporarily closed southbound I-15 starting at 31st Street in Ogden and the junction onto eastbound I-84, according to the Utah Department of Transportation.

It's not the first time a trailer carrying cattle has toppled near the same ramp. A 63,000-pound load of cattle tipped in January 2016, killing several cows.

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According to the Utah Highway Patrol, the driver was exceeding the 45-mph speed advisory for trucks taking the ramp from I-15 onto I-84. When the cattle in the trailer shifted, the truck rolled.

Images from KSL-TV Chopper 5 show a semitrailer tipped on its side on the eastbound I-84 bridge. Below, several cows could be seen apparently dead or wandering on southbound I-15.

It is unknown how many animals were killed in the crash, UHP reported. The truck's driver was not injured.

Contributing: Annie Knox, Brianna Bodily