I've always wondered why the sophisticated cartels didn't use simple solutions at the border. I've heard these alternately called Road Stars and
Road Spikes. I first saw them in catalogs as a kid and it's probably best for the world that it took real effort to order snail mail catalog products
back then. I never got any. They are basically just multi-pointed 'stars' with pointed ends that always land with one point sticking up. Throw a few
handfuls out and, in theory, it should basically close the road behind the vehicle tossing them. I always wondered if they'd have actually worked.
Now I know. They DO work. Well, I'll be......