Looks like Braille podotactile

These podotactiles, found on the subway platform in Lyon, France (metro station "Jean Jaurès" direction Charpennes) look quite funny, as if they had been stuck and removed: Missing podotactile

As the color shows, they have been removed over time (one can see the mark of previous podotactiles) but what if this could mean something in Braille ;) One step towards more use of proprioception as a sense to navigate the city (an often overlooked one for sure, not by skateboader though)!