Ralph Nader is 69. Joan Claybrook is 66. Clarence Ditlow is about to turn 60.
The three most influential advocates for automotive safety are in their seventh decade or close to it.
Brian O'Neill of the Insurance Institute for Highway Safety, also highly effective but as a different type of advocate, is 62.
Mere mention of Nader, Claybrook or Ditlow still gets a rise out of people in the industry - even though automakers, suppliers, dealers and others in the business say they, too, are committed to safety.
Many in the industry charge those outspoken advocates with selective use of facts and blame them for promoting over-regulation by government and for fostering the litigation explosion.
But any fair person must give credit to those "big three" safety advocates for some of the vast improvements that have been made in vehicles and for their own hard work, diligence and, yes, longevity on the job.
Still, the aging of those advocates who have built the modern automobile safety movement raises some intriguing questions.
Who, if anyone, is prepared to step up to take their places?
Have those safety leaders groomed potential successors? Will the eventual departure of the powerful personalities who have driven safety advocacy for nearly four decades make the issue a lower priority in Washington?
In their absence, will automakers get more traction with the argument that all the big safety improvements in vehicles have been completed and most of the attention should be devoted to driver behavior?