Little known law

There's a law, most people don't know about, or don't care. Most states have adopted it. Two I'm sure of are California and Missouri.
The law says, "If you are running your windshield wipers, you must have your lights on." That may seem a little odd, but the logic is: If it's raining, it's at least a little bit dark, and you need your lights on so others can see you. You notice, it's not so you can see, it's so others can see you. The first ones to turn their lights on should be people in drab cars. For example gray or black. You can actually be given a ticket for it. I suspect they'll start doing that very soon.