Wandering around in the street of Paris last thursday, I ran across this terrific street plate:

Why do I blog this? I found interesting the usage of the street plate as a way to create new affordances such as a direction map. Judging from the picture, there is already a street plate in the background but that one is more relevant. Of course this is the 1st arrondissement of the french capital, hence you won't find this in every parts of the town...