If you really want to stop explosives that aren't manually triggered why not just use something like a transparent bouncy house to softly catch a stop impact triggers
Honestly, looking at the ordinances, even smaller ones that are more than enough to hit the driver of this Chinese golf cart.
This cope cage would be effective if it wasn’t the only layer of defense. 2-3 strategically placed drones would immobilize most meat bags hiding in it. This on top of an armored vehicle would make more sense.