Litter-free Zone Updates: Materials & Location

So far, I've got three signs that will post into the cigarette and trash waste area at the corner of State & Roosevelt. They are very generic and are suited for their purpose. They'll be printed on thick paper and stapled to thin, wood planks to stick into the ground.

I have a feeling that signs like these are just like any other a person would see... And so they may not get the attention they deserve. I've been pondering designing signs inspired by the "farewell" signs at the end of Disney's It's A Small World ride:

A collage of brightly colored signs all using custom type treatments may stick out like eye candy and an accepted art installation on the street. Maybe more people will stop and take notice this way? It certainly is more positive.