Artistic License: This movie requires some MST3K Mantra ("It's just a show") due to a lack of Consistency in exactly what machines can come to life. Some mechanical items should be "alive" but aren't (like cars and the mechanical parts of the aresenal of weapons), and some things that really shouldn't be alive are (the side-view mirror moving, the valve on the gas refill truck, the swivel for the small military car's machine gun).
In a throwaway line, a radio station reports that "some machines are waking up slower than others."
Corrupt Hick: Bubba Hendershot runs a truck stop that mostly employs people on parole allowing him to force them to work more hours then he has to pay them for. If they refuse, then he can get his friend who is on the state patrol to arrest them and send them back to jail. Billy theorizes that Bubba also sells guns on the side when his gun cache is found.
When the truck stop's arcade room starts going crazy, a guy in there starts collecting all the coins the machines spit out. Staying there, he gives an opportunity to one of the cabinets to hypnotize and electrocute him.
Brad leaves behind the rest of cast to take a ring from a corpse, and is then flattened by the Kidz Toyz truck.
Hendershot's gun collection in the truck stop's basement at one point serves this purpose for the protagonists, giving them a chance blow up some of the vehicles.
At one point, the trucks call an armed military vehicle for assistance when they need to coerce the cast to give them gas.
Plug 'n' Play Technology: Kind of a weird partial example. There's no actual interfacing of differing technologies per se, but the weird alien radiation which animates the Earth's gadgets does endow those gadgets with some unexpected abilities — such as the ability to see/sense humans, or to move independently even with no built-in means of locomotion. In the short story, at least, the "alien ray" was supernatural.
Scenery Gorn: At one point, Deke slowly rides his bicycle through the streets of a neighborhood littered with bloody, butchered corpses. Even with the incongruous rock soundtrack, it's one of the more effective and properly disturbing parts of the film.