Drivers were stalled in Yellowstone National Park as a large bison stood across the roadway and refused to budge, footage posted on Monday, March 6, shows.In the video, which was shot Cindy Shaffer, an area resident who regularly posts about Yellowstone, Shaffer says the bison had already been standing in the road 20 minutes.The driver of a truck in front of Shaffer is seen trying to edge his vehicle around the bison to try to prompt it to move, but without success.“This is just crazy,” Shaffer is heard saying.Shaffer has run into a couple of “bison jams” "before":https://newswire.storyful.com/?search_term=yellowstone%2520cindy but was impressed this time by the “huge” size of the animal, she said. Credit: Cindy Shaffer via Storyful