MY SON WAS DRIVING MY 2020 TOYOTA TUNDRA AND HE WAS TRAVELING APPROXIMATELY 30 MPH AND WAS NOT PAYING ATTENTION AND FOR SOME REASON THE PRE COLLISION SYSTEM DID NOT ENGAGE AND STOP OR EVEN SLOW THE TRUCK DOWN HE SLAMMED INTO ANOTHER TRUCK AND THAT TRUCK WAS PUSHED INTO ANOTHER CAR LUCKILY NO ONE WAS HURT.