US files charge against Toyota, $1.2B penalty

How many of those are drive by wire? To me that makes a big difference. Do these vehicles have sensors on the throttle blade and also the throttle pedal? On the snowmobiles I used to have had a sensor on the carb and also on the thumb throttle. If the carb slide was open but the connection was not made on the thumb lever the ignition cut off. Now this would not work on a stuck under the floor mat scenario though. But in the event of a true runaway with no floor mat obstruction how does this happen on a modern automobile?