DRIVING ON THE HIGHWAY AT A SLOW SPEED DUE TO TRAFFIC, AROUND 20 MPH. THE CAR IN FRONT OF ME UNEXPECTEDLY CAME TO A COMPLETE STOP. I HAD 2 CAR LENGTHS AND PUT ON THE BRAKES, BUT THE CAR NEVER "GRABBED"--I JUST SLOWED AND COASTED INTO THE BACK OF THE CAR AHEAD OF ME. BECAUSE THE ABS ON A HYBRID DOES NOT KICK IN UNTIL THE CAR REACHES 25 MPH, MY CAR WAS BUSY REGENERATING POWER FROM THE BRAKES RATHER THAN DOING A QUICK, EMERGENCY STOP. NOW I AM LIABLE FOR THE DAMAGE TO THE CAR AHEAD OF ME THAT I REAR-ENDED, AND I AM CONCERNED THAT I WOULD NOT STOP PROPERLY IF A CHILD RAN IN FRONT OF ME ON A NEIGHBORHOOD STREET. THIS HAS BEEN SUBMITTED AS A PROBLEM WITH THE TOYOTA PRIUS AS WELL ON HYBRIDCARS.COM FORUM. *TR