PE00 020; CONSUMER WAS TRAVELING ABOUT 70MPH ON HIGHWAY AND HEARD A POPPING NOISE. VEHICLE VEERED OFF INTO A BAR DITCH, AND IT TRAVELED DOWN BAR DITCH, AND HIT GUARDRAIL. THEN WENT SIDEWAYS INTO THE LANE OF TRAFFIC, AND THEN HIT ENBANKMENT. INCIDENT WAS CAUSED BY A TIRE BLOWOUT. *AK