Because heavier sleds travel quicker, teams who do not achieve the maximum occupied weight may add ballasts to make their bob heavier. At the end of the run, officials weigh the sleds to ensure they fulfill the weight limit. They go fairly rapidly, as it turns out. According to the PyeongChang Winter Olympics website, the bobsled, also known as the bobsleigh, has an average max speed of 83 mph (135 kmph). That is quicker than the majority of people have ever driven a car (the highest speed limit in the United States is in Texas at 85 mph, fyi). The team has around 54 yards (50 meters) to accelerate the sled from a full stop to a speed of approximately 24 miles per hour (40 kilometers per hour). It's more difficult to get the sled rolling than it is to keep it moving.