Anouchka/E+/Getty ImagesShort answer: motorcycles. Which is still motorcycles, but they pack in a lot of pertinent information as to why that's so, and they discuss numerous ways that motorcycles could be and are becoming safer. In 2015, per 100 million miles (160 million kilometers) traveled, passenger cars had a 0.89 passenger fatality rate while motorcycles had a 25.38 occupant fatality rate, notes a 2015 report. They also have a driver death rate that's four times higher than cruiser or standard motorcycles, notes this joint research report. Now That's Interesting In the early 1970s, a large majority of states had universal helmet laws to satisfy highway safety funds.