Graffiti tags are not exactly street art; they are more of a signature just to say “I was here.” As such, they are rarely legible. French artist Matthew Tremblin took on a project to “clean up” the tags on the streets of France, by changing those signature tags to a legible font.
Now isn’t that better? You can see more examples of the cleaned-up graffiti at Colossal. http://www.thisiscolossal.com/2016/07/street-artist-paints-over-ugly-graffiti-to-make-it-legible/