During most of the chase scenes, the police cars change alternately from Plymouth Satellites to Plymouth Furys and one changes to an AMC Matador in the final chase scene.
The truck that Poke is driving at the end chase scene changes alternately from both headlights out, to both headlights intact to the left headlight out.
The police car in front of the roadblock on the bridge is facing sideways, but when another police car crashes into it, the first one is now facing vertically.
In one exterior shot of Duke driving the police car, before he almost crashes into an oncoming train, the stunt driver is seen wearing sunglasses.