From the UK, and not everyone is aware of this. But it has been tried in the courts, and I'm aware of one person (friend of a friend) who is in jail as a resul

From the UK, and not everyone is aware of this. But it has been tried in the courts, and I'm aware of one person (friend of a friend) who is in jail as a result if having an accident after driving for 4 hours. I have a friend who works in car insurance, and he's pretty firm about the requirement to not drive more than two hours straight. Our motorways are covered in cameras, so if something happens you generally can't pretend you took a different route or stopped in a (camera covered) service station!