2012 CHEVROLET VOLT Electrical Systemignitionswitch Problems

CAR WAS BEING DRIVEN ON AN INTERSTATE HIGHWAY AT THE SPEED LIMIT, APPROXIMATELY 30 MILES FROM HOME. AS THE DRIVE BATTERY'S CHARGE ENDS,THE VEHICLE SHOULD START THE INTERNAL COMBUSTION ENGINE TO TAKE OVER PROPULSION FROM THE BATTERY. DID NOT HAPPEN. WHAT DID HAPPEN WAS A MIL ILLUMINATION,AND SEVERAL MESSAGES ON THE DRIVERS DISPLAY ABOUT THE "PROPULSION SYSTEM NOT AVAILABLE" OR WORDS TO THAT EFFECT.(SPOUSE WAS DRIVING CAR, NOT SUBMITTER.)THE DRIVER WAS IMMEDIATELY FORCED TO NEGOTIATE THROUGH SEVERAL LANES OF VERY BUSY INTERSTATE TRAFFIC TO GET TO THE ROAD SHOULDER ALL WHILE DEALING WITH WHAT WAS EVENTUALLY A COMPLETE LOSS OF DRIVE POWER. DEAD BY THE SIDE OF THE ROAD, SEVERAL ATTEMPTS WERE MADE TO START THE INTERNAL COMBUSTION ENGINE.NO SUCCESS.ROADSIDE ASSISTANCE NOTIFIED.I HEAD TOWARDS LOCATION TO OFFER HELP (1 HOUR AWAY FROM HOME) AND ARRIVE BEFORE TOW DOES. MANAGE TO START INTERNAL COMBUSTION ENGINE THIS TIME, AND CRIPPLE CAR 7...