Other mistake: Towards the beginning of the film JJ (Burt Reynolds) lands his plane in a town to get more beer. You can clearly see the a large crowd of spectators in the background standing behind the wooden barriers which the police had set up for the filming.
Other mistake: When the Japanese car passes the troopers sitting by the road, they're going 125 miles per hour by their speedometer. The trooper says that they're doing 125, but the radar readout says 20.