Agreed. Keep the sign Just because one driver isn't able to make use of it doesn't mean it isn't useful to other drivers.

It's not always obvious in the moment how steep or long a grade is. If there's lateral curve to the road you might not be able to see how far down this stretch takes you.

So the sign gives some indication of that in addition to the function of saying what to do.

There's a lot of information coming in and quickly when driving, including trying to keep an eye on that asshole tailgating you so something that cuts the cognitive load with high signal content is good.

@dredmorbius @clacke