It looks like markings for a construction crew that is about to do some underground work.
Yes, I agree with Andy, probably sometihing for construction workers.MersadMersad Donko Photography
I'm not an expert and I need a translation :)
Those markings must be important to someone, but are not meant for us. Interesting signs well spotted.
Ha! Ha! My yard has a lot of those messages right now. My street is being widened and they're installing underground power lines and replacing phone lines and such, everything is labeled! Bright pink spray paint!
Very reasonable answer, thanks Karen.
Als degene voor wie ze bedoeld zijn maar weten wat het betekent.
Those markings are always such a mystery! There a lot of them in your pic.
It's probably marking something technical, like gas or water lines.
Someone must know the answer to this mystery. Hopefully, it will be someone in authority!
A strange sign in many ways...strange that it could be completed on a road (traffic?) + odd colour + elusive meaning. The sign seems to be all round manholes...some connection?
A real puzzle this one.My SIGNS, SIGNS
Utility hieroglyphics - common site in urban environs.