When the convoy has to stop because of the school bus, Pig Pen runs into an ice cream truck; the back doors on the ice cream truck swing open and one falls to the ground. In the next shot the door is still on the truck.
Throughout the film, Rubber Duck's truck has a grill guard. In the scene after his and Pig Pen's trucks have crashed through the jail, the grill guard is missing when the truck pulls out. Yet it's back on there for the rest of the movie.
When Rubber Duck and Violet the waitress are walking towards RD's truck at the diner, you can clearly see that Violet's pantyhose has a huge tear and run in one leg. But when she climbs out of the truck after the fight, her pantyhose are flawless and new.
When Sheriff Lyle's squad car gets sandwiched by two trucks, the camera used inside the car is mounted in the rear, but its size was such that it couldn't be positioned out of shot of the second camera mounted on a flatbed trailer in front of the action.
At 50:22 (as per YouTube) the caption says "New Mexico" and "I-40". However, the shot is from I-25 just west of Isleta Village. That particular profile of Sandia Crest is only visible from this vantage point, and other features in the picture also give it away: the small escarpment to the right of the truck, and the small mountain in the far background on the left (Google maps, street view can be used to verify).