A snowy road in Yellowstone National Park was recently the site of a classic “bison jam,” as a large herd of bison brought traffic to a standstill. Viral footage captured the scene in Hellroaring Canyon, where drivers encountered the massive animals slowly making their way across the snow-covered roadway. These wildlife traffic jams are a quintessential Yellowstone experience, especially during the winter months when bison are more likely to move to lower elevations in search of food.