This is one of the old fashioned road signs to tell you the right way as they are used for many, many years in Holland. At some locations they are still there, nowadays mostly used to guide padllebikes... We call it a paddestoel (a Mushroom in English).
I got a very, very special request from my good old friend Bill Boucher a few days ago. That's the reason I saw this sign, mentioning the Canadian Cemetary in Holten. I'm busy with a vid what wil show you about this special request... I hope I can show you the vid tommorow.