National Highway Traffic Safety Administration (NHTSA)

The National Highway Traffic Safety Administration (NHTSA) investigates safety defects in motor vehicles, sets and enforces fuel economy standards, helps states and local communities reduce the threat of drunk drivers, promotes the use of safety belts, child safety seats and air bags, investigates odometer fraud, establishes and enforces vehicle anti-theft regulations, conducts research on driver behavior and traffic safety, and provides consumer information on motor vehicle safety topics.

This agency rolls up to Department of Transportation (DOT).