> Yes, but a completely separated system. The odds of both software systems failing simultaneously is getting in the hash collisions domain... It isn't, really

> Yes, but a completely separated system. The odds of both software systems failing simultaneously is getting in the hash collisions domain... It isn't, really, in a lot of newer cars. You have a brake override system [1] that can reduce the power output of the engine by various means. [1]: http://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/brake-override-systems.htm http://auto.howstuffworks.com/car-driving-safety/safety-regu...