There's an opinion held by Officialdom that we can read things better if we go letter-by-letter. Which explains why ambulances and the police like to write their names back to front on the hoods of their cars. We might never guess who they were while trying to figure out the letters in our mirrors. Similarly, while driving and reading the letters written on the road for our attention (or would this sign be for pedestrians?). But this isn't a photograph of a sign for the bus, but a forward thinking councillor in Mojácar anticipating the rise in the sea level thanks to global warming (that and pumping all our sewage out there). Yes, one day it'll be 'No Spitting on the Sub'.
En castellano, aquí.