ON 08-05-2019 I WAS TRAVELING ONTO THE INTERSTATE, UPON ACCELERATION MY AUTOMOBILE BEGIN TO POWER DOWN, IN FRONT OF A TRACTOR TRAILER. I ATTEMPTED TO MOVE OVER TO THE RIGHT SHOULDER BUT THE CAR WOULDN'T ACCELERATE TO DO SO IN A SAFE MANNER. AFTER ABOUT ONE MINUTE OF CONTINUOUSLY ACCELERATION, THE CAR BEGIN TO MOVE. I HAVE BROUGHT THIS TO THE ATTENTION OF KIA IN THE PAST, THE CAR HAS BEEN TAKEN TO SEVERAL KIA DEALERSHIP WITH NO RESOLUTION. THIS REMAINS TO BE AN EXTREME SAFETY CONCERN, THAT COULD BECOME DEADLY. ON 08-03-2019, IN AN UNRELATED INCIDENT I WITNESSED A KIA SOUL BURN TO THE GROUND AFTER CATCHING FIRE; SIMPLY PUT THESE VEHICLES APPEAR TO BE VERY UNSAFE FOR OPERATION.