DURING THE OPERATION OF THE VEHICLE ON A NORMAL SURFACE STREET DURING MORNING COMMUTE THROUGH CITY STREETS FOLLOWING TRAFFIC AT SPEEDS NOT EXCEEDING 35 MPH THE VEHICLE SEEMED TO HAVE ACCELERATED (SPED UP) DURING THE APPLICATION OF THE BRAKE CAUSING THE VEHICLE TO STRIKE THE VEHICLE IN FRONT OF IT. THE DAMAGE TO THE VEHICLE STRUCK WAS NOT VISIBLE DUE TO THE SLOW SPEED, BUT IT DID CAUSE MINOR DAMAGE TO THE VEHICLE IN QUESTION. DURING THE EVENT THE DRIVER PERCEIVED ACCELERATION AT THE TIME OF THE APPLICATION OF THE BRAKES AND THE SOUND ASSOCIATED WITH THE ANTI-LOCK FEATURES BEING ENGAGED. AT THE END OF THE INCIDENT THE BRAKE PEDAL WAS DEPRESSED ALL THE WAY DOWN TO THE FLOOR. THIS IS VERY CONCERNING SINCE THE REACTION OF THE VEHICLE WAS OPPOSITE OF THE DRIVER COMMAND. THE VEHICLE IS PART OF THE TOYOTA SMART STOP COMPANY RECALL, BUT THE SOFTWARE UPDATE WAS NOT DONE SINCE IT IS CONSIDERED OPTIONAL FOR THE OWNER TO DO. BASED ON THE REASONS FOR THE RECALL IT IS CONCERNING THAT THE CONDITION IT IS ADDRESSING MAY HAVE OCCURRED. BECAUSE THIS REPORT IS BASED ON DRIVER PERCEPTION I ONLY REQUEST THAT THE SMART STOP RECALL BE ADDRESSED AND POSSIBLY MANDATED TO ENSURE THAT THE ISSUE IS FROM THE SOFTWARE THAT OWNERS WILL TAKE THE TIME TO HAVE IT ACCOMPLISHED.