TIRE BLEW OUT AND CAUSED VEHICLE TO SWERVE RIGHT AND TO COLLIDE WITH THE REAR TRAILER OF AN 18 WHEEL TRACTOR-TRAILER, AND THEN VEHICLE PROCEEDED OFF ROAD ACROSS SHOULDER OF HIGHWAY AND THROUGH THE ADJACENT FENCE. VEHICLE RECEIVED EXTENSIVE DAMAGE AND BOTH OCCUPANTS WERE INJURED AND REQUIRED MEDICAL TREATMENT.( DOT NUMBER: VDHL TIRE SIZE: P235/75R15 )