I do it anyway out of courtesy to the trooper. Same for joggers/walkers/bikers on the local roads.Same here. I've always done this, reflexively, without thinking. Just always seemed like a good idea.
But it's good to know that it's not just a good idea, it's the law.
(Which reminds me of a T-shirt I saw once:
186,000 miles per second. It's not just a good idea. It's the Law.)
But it’s good to know that it’s not just a good idea, it’s the law.
Why do you need a law? I think we have plenty of laws. We don’t need any more.