According to AAA
"Seniors are safe drivers compared to other age groups, since they often reduce risk of injury by wearing safety belts, observing speed limits, and not drinking and driving. However, they are more likely to be injured or killed in traffic crashes due to age-related vulnerabilities, such as more fragile bones."
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This research is about cars not carts. But if you subtract not wearing seat belts, not speeding and not drinking. I wonder what the count would be. You can't do anything about the fragile bones or someone that veers into you. You can't do anything about a vehicle that is designed to go 12 mph and is more likely to flip at 20 mph. I asked that question today at golf and someone said the the 20 mph vehicles are built differently.