It's only been on the books here for a few years. Surprisingly, everone seems to follow it. I think that is becasue the newer cars do it automatically. My lights come on in about 3 minutes of having the wipers on.I've wished for yrs that KY had that law.
Now getting cars to move over to the center lane if the state police have someone pulled over or an emergency vehicle is pulled over... That's a different story.