AFTER I WAS REAR ENDED MY 2018 F150 STARTED SMOKING AND CAUGHT FIRE AT THE BASE OF THE POST BESIDE THE DRIVER SEAT WHERE THE CARPET AND PLASTIC SIDE COVER COME TOGETHER. THIS HAPPENED WITHIN 10 MINUTES OF THE CRASH. I WAS TRAVELING APPROXIMATELY 10 MPH ON A 65 MPH 4 LANE, SLOWING DUE TO TRAFFIC CONGESTION WHEN I WAS REAR ENDED BY A 2007 CHEVY PICKUP TRAVELLING AT ABOUT 60 MPH. HITTING MY TRUCK HARD ENOUGH TO LIFT THE FRONT END AND LAND ON THE 4 FOOT HIGHWAY BARRIER IN THE FRONT, MY TRUCK CONTINUED AND THEN STUCK THE TRUCK IN FRONT OF ME WITH MY PASSENGER DOOR CAUSING THE REAR OF THE TRUCK TO ALSO LAND ON THE CONCRETE BARRIER. I WAS HELPED FROM THE TRUCK THRU THE RIGHT SIDE BACK DOOR BY THE DRIVER OF THE TRUCK MY VEHICLE IMPACTED. OFFICER WAS ON SITE IN ABOUT 3 MINUTES AND WANTED TO MOVE MY TRUCK FIRST, HE ASKED IF I HAD ANYTHING I NEEDED OUT OF THE VEHICLE. TROOPER AND I WENT TO GET MY BELONGINGS WHEN WE NOTICED THE SMOKE IN THE CAB. I WAS NOT ABLE TO GET ANYTHING FROM THE TRUCK BECAUSE THE FIRE STARTED AND SPREAD QUICKLY. FIRE WAS ONLY ON THE INSIDE OF THE VEHICLE.