Yeah, "only in school zones" and "during school hours" makes it all seem sooo rational. The reality is try driving 20mph. It is incredibly, unnaturally slow and 15mph below the normal posted limit of 35mph. Second, it's not just during opening and dismissal, it's all day long, even when no children are anywhere around. And finally, the whole program is administered by a private company who installed the equipment. You send your "fine" to them and they pocket the majority of the revenue as profit and only pass on a small fraction to the city. This is obscene public policy in the guise of children's safety.