U.S. auto fatality decline (1972-2014)
U.S. traffic deaths peaked at 54,589 in 1972. Federal standards on seatbelts, airbags, and crashworthiness, state seatbelt laws, drunk-driving crackdowns, and better road engineering combined over four decades.
The fatality rate per 100 million vehicle miles traveled fell from 4.30 in 1972 to about 1.08 by 2014.
Absolute deaths roughly halved even as vehicle miles traveled more than doubled.
A second comparable case where a measurable safety statistic fell by half or more through layered regulation, mandated equipment, and training, without a single dramatic cause.
