Yellowstone National Park drivers were stopped at standstill as they watched a massive herd of bison pass through.

A herd of bison held up traffic in Yellowstone National Park in Wyoming, footage posted online on Tuesday, April 15, shows.

Bison jams are not uncommon in Yellowstone given their population at the park has ranged from 3,500 to nearly 6,000, the National Park Service says.

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