content: a sudden jolt isn't a great deal better people will jerk the wheel in a random direction being just as bad as drifting but more sudden so harder to predict. the real solution is a simple one of self discipline and not driving if you are that tired. If they want to encourage that start treating a car related actions like they do guns, a 2000 pound hunk of metal and plastic that can do 70mph is most defiantly a deadly weapon prosecute it accordingly. though I'll admit that tiredness isn't my biggest issue with drivers it is road rage and especially the way it shows up at random against motorcyclists, a friend had someone swerve at him trying to run him off the road because he was passing them while they were doing 45 in a 55 I don't find attacking someone with a car an acceptable response to them wanting to do the speed limit.