Good . Although uncertainty is bad the shorter the deal takes the worse it would be for us IMO . If it does take over 2 years the anger from the brexit brigade is going to be unbelieveable ! <| sep |> Entirely possible , but we don ' t know what sort of deadlock recovery systems were used . There was some interesting work done in the Toyota uninteded acceleration investigation . If the process which operated the electronic throttle locked , then this could cause a struck throttle type failure . To guard against this , the same process would poll the brake pedal sense line , and when it detected a state change would send an event across a serial line to a supervisory CPU . The supervisory CPU would also sense brake pedal changes via separate hardware and ran a process which would compare the brake data coming from main CPU over serial , with the 2 nd brake pedal switch . If there was a discrepancy for more than a couple of ms , the supervisory CPU would cut the power supply to the main CPU . The idea being that if the serial data stopped or was discrepant , it indicated a serious failure of the main CPU or its software . In the case of Toytoa , it was shown that even if the car had suffered uncontrolled acceleration due to failure of the electronic throttle control software , as soon as the brake pedal was pushed or released , if depressed at the time of the crash , the ECU would immediately power down stopping the engine .