Why Starting in model year 1998 all new cars and in model year 1999 all new light trucks must have dual airbags?

Starting in model year 1998, all new cars and in model year 1999, all new light trucks were mandated to have dual airbags to enhance occupant safety in the event of a collision. This regulation was implemented by the National Highway Traffic Safety Administration (NHTSA) in response to research indicating that airbags significantly reduce the risk of injury and fatalities in crashes. The requirement aimed to standardize safety features across vehicles and provide better protection for both the driver and front passenger.