Yes, definitely the law here in NJ. And most cars with 'daytime running lights' only have headlights lit - which meets the state requirement 'wipers on; headlights on' but usually the daytime running lights do not include any rear lights. Most vehicles with 'auto on' lights - both front/rear lights are on. Like so many other things, wonder how we managed when we had to do things on our own! When I was taught to drive 40+ years ago, it was taught that you turned your lights on when it was dusk / rainy / etc. Didn't have auto anything in those days. Granted there might be a dead battery once in a while, but.... Now as to lights on when on single lane roads even in the daytime - I personally think that's a bit of overkill. Been on those type of roads and done it but not sure I really see much advantage. In today's world most cars have daytime running lights anyhow. I find it horribly distracting in bright sunlight myself.