27% of traffic fatalities are speeding related. Roughly 1/3 of traffic fatalities involved a drunk driver, over 0.08. More fatalities would be alcohol related, but the driver may not have met the 0.08 threshold for drunk. A quarter of all car accidents are thought to be cell phone related. Most traffic fatality victims were not wearing a seat belt. Drugs other than alcohol are involved in 16% of car accidents. It seems the most effective way to reduce your risk of serious injury in a crash comes down to not driving like an idiot and wearing your seat belt. When automated braking becomes standard, maybe it’ll prevent some of the drunk/high/speeding/texting idiots from running into me, but that’s a public policy question not a personal consumer issue.