INCIDENT OCCURRED: JUNE 30, 2015 A TRACTOR TRAILER WAS PASSING ANOTHER VEHICLE AND PROCEEDED TO COME INTO THE LEFT LANE. I HAD CRUISE CONTROL ENGAGED. THE TRUCK CAME OVER ADMITTEDLY AT A SPEED THAT WAS GOING SLOWER THAN THE RATE OF SPEED I HAD ON MY CRUISE CONTROL. WHEN I WENT TO APPLY THE BRAKE, I FELT AS THOUGH MY CAR WAS NOT DECELERATING ENOUGH BASED ON THE PRESSURE I WAS APPLYING TO THE BRAKE. I QUICK CHECKED MY SIDE MIRROR- I WAS UNABLE TO GO AROUND THE DRIVER BECAUSE A CAR WAS NEXT TO ME AND I CHECKED MY REARVIEW MIRROR TO ENSURE I WAS NOT GOING TO BE REAR-ENDED AS WELL- KNOWING I WAS TOO CLOSE AND GOING TO COLLIDE WITH THE TRUCK DRIVER AT THIS POINT. I APPLIED AS MUCH PRESSURE AS I COULD TO THE BRAKES TO DECELERATE BUT UNFORTUNATELY STILL COLLIDED WITH THE DRIVER. MY AIR BAGS DID NOT DEPLOY- DESPITE THIS, IT ALLOWED ME TO SEE MY MIRRORS IMMEDIATELY FOLLOWING THE INCIDENT SO THAT I COULD SAFELY COAST TO THE SHOULDER OF THE PA TURNPIKE WITHOUT DISRUPTING TRAFFIC. MY 2 CONCERNS: WAS BRAKING FAULTY WHEN CRUISE CONTROL IS ENGAGED? ALSO- MY AIR BAGS DID NOT DEPLOY.