 10 miles an hour over the speed limit. 15 over. 20 over. It just might put you six feet under. Extra enforcement now on Minnesota roads. A message from the Minnesota Department of Public Safety. Check the backseat. Check the backseat. Gets in your head, right? Good. Because every year, dozens of children are forgotten in the backseat. Cars get hot fast and can be deadly. So get it in your head. A message from NHTSA and the Ad Council.