TRAIN 220-31 WAS STOPPED ON THE SIDING AT NSB IN THE PROCESS OF PICKING UP NORTH CARS. THEY WERE NOTIFIFIED BY TRAIN 121-31THAT AN AUTOMOBILE HAD STRUCK THE SIDE OF THEIR TRAIN. THE DRIVER OF THE AUTOMOBILE STATED THAT THE BRAKES FAILED CAUSING HIM TO STIKE THE TRAIN. NO INJURIES WERE SUSTAINED.