The fact that you say "in the USA" on regarding an issue that did not exist in the 18th century and is not one of the handful of things we have chosen to federally regulate since is a massive red flag that you're wrong.

And FWIW the driver's manual for my state offers no guidance and simply says it indicates the light will soon be red.

Since the other person who replied said their state on the other side of the country does this I suspect it's one of those things where there's a federally issued suggestion (probably from the NHTSA) that some states implement and some don't.