Unusual Traffic Jam at Yellowstone National Park

From the U.S. Department of the Interior:

This is a different kind of traffic jam at Yellowstone National Park. Bison weigh up to 2,000 lbs and can pack a lot of attitude. They can run up to 35 miles per hour, but these appear to be taking their time. We recommend patience. Photo by Allen Beyer (www.sharetheexperience.org). — at Yellowstone National Park.