CONSUMER WAS DRIVING APPROXIMATELY 50-55MPH WHEN SHE LOST CONTROL OF VEHICLE, SPUN AROUND, SLID OFF ROAD, HIT GAURDRAIL/THEN THE SOLID BLOCK POST OF BRIDGE HEAD-ON. SPUN AROUND AND HIT THE BRIDGE FROM THE OTHER SIDE. DRIVER'S SIDE AIR BAG FAILED TO DEPLOY. *AK