birdog, I have to disagree with you here. My brakes failed at 60mph on the M8 approaching the Newbridge roundabout in Edinburgh (when it was a roundabout). My car was well maintained, regularly serviced and there was no indication there was a problem the whole way from Glasgow. Sometimes mechanical failure just happens. I didn't crash into the queue in front of me because I managed to slow down in time, but it's not something I would ever want to repeat. I totally agree that most accidents could be prevented and are caused by human error, but I don't think 100% of accidents are.