1965: Ralph Nader publishes Unsafe at Any Speed, alleging rollover danger of Chevrolet Corvair and General Motors coverup.
1966: Federal government creates motor vehicle safety agency, now called National Highway Traffic Safety Administration.
1973: NHTSA begins accepting comment on possible rollover standard, but takes no action.
1981: NHTSA rejects petition for defect investigation of Jeep CJ for alleged rollover propensity.
1984: NHTSA begins requiring sport-utility vehicles to carry warning labels about rollover dangers.
1988: NHTSA declines to investigate Suzuki Samurai for alleged rollover hazard.
1990: NHTSA closes investigation of Ford Bronco II without finding rollover defect.
1991: Congress passes highway bill that instructs NHTSA to study rollover dangers and mitigation measures.
1992: NHTSA announces it will develop a rule to provide consumer information on rollover propensity.
1994: After six years of study, NHTSA terminates attempt at writing rollover prevention standard; it says such a rule would require radical redesign of light trucks.
1996: NHTSA rejects second petition for defect investigation of Suzuki Samurai.
1997: NHTSA rejects petition for defect investigation of Isuzu Trooper II.
1997: Swedish magazine flips new Mercedes A class in emergencyavoidance maneuver called the moose test, prompting Daimler-Benz AG to recall the car and re-engineer it for added stability.
1997: NHTSA begins new study to see if it can develop a reliable, repeatable test for rollover propensity.
1998: U.S. Department of Transportation announces plan to upgrade rollover warning labels on sport-utilities.