Problem with banning B (bikes, to not get lost) is that even SUVs are small and fragile to big trucks. Should all vehicles in the road be banned due to its size, except the biggest trucks?

The problem is that banning key cars for their size or fragility is logically inconsistent. Banning now smaller vehicles like motorcycles and bikes is a patch to wrong logic. This is just targeting a specific kind of car because some reason that the regulator doesn't want to disclose.