Does anyone know of an airport with a mandatory instruction sign?  an example would be a sign that says something like 15-APCH where the lettering is white and the sign background is red.  I am also looking for an airport that has a runway distance remaining marker sign if anyone knows of one that implements that as well.

Thanks so much!

-APCH
"Denotes area to be protected for aircraft approaching or departing a runway."

https://www.faa.gov/airports/runway_safety/publications/media/QuickReferenceGuideProof8.pdf

An example would be taxiway RA at PHNL to protect runway 4R.

Thanks Sojourned.  Exactly what I was looking for,