WHILE MAKING A TURN AROUND UNDER THE FREEWAY, I SAW AN UPCOMING SUV STOPPED FOR CROSS TRAFFIC. BY THE TIME I WAS WHERE THE SUV WAS I SAW THE SUV ACCELERATE TO MERGE. I CHECKED OVER MY SHOULDER FOR THE CROSS TRAFFIC UNAWARE THE SUV HAD STOPPED AGAIN IN FRONT OF ME. MY SUV'S COLLISION WARNING AND BRAKING SYSTEM NEVER ENGAGED OR ALERTED ME. I ENDED UP REAR ENDING THE SUV IN FRONT OF ME CAUSING A FENDED BENDER.