Dealing with back seat drivers is easy

Dealing with back seat drivers is easy....Stop the car, get out and tell the back seat driver you are too tired to drive, place them in the drivers seat and instruct them to drive on... Then nag the hell out of them for at least 30 miles...mind that pedestrian; carefull, its a 30 mph zone, too far over to either side etc...nag nag nag.... works a treat. If they refuse to drive, tell them you're too ill to carry on and they need to get a taxi....