What stops highway robbery today? Logistics. Unless you know exactly what's in the cargo, it's probably not wortht he effort because you might get a load of to

What stops highway robbery today? Logistics. Unless you know exactly what's in the cargo, it's probably not wortht he effort because you might get a load of toilet paper. Also getting your ill-gotten gains away from the scene is going to be a lot of work, how much stuff are you going to be able to unload before the cops show up and how many vehicles will you need to get it? You'd be better off stealing the truck itself.