Electronic stability control mandate (2007)
IIHS and federal researchers found electronic stability control cut fatal single-vehicle crashes by more than half. The technology automatically brakes individual wheels to stop skids.
NHTSA issued a rule in 2007 requiring the system on new vehicles.
Stability control became standard on all new U.S. passenger vehicles by the 2012 model year, preventing thousands of deaths.
It is the clearest case of independent crash data driving a federal mandate. The Waymo study could start a similar path from evidence to rules.
