Canadian artist Lauren Marsden has created knitted street signs for every street she has lived on in Victoria, BC.
The style of each knitted piece is based on that of the street sign she covers over. Because of this I do wonder how long it takes for everyone to notice her work.
Implications - Small scale initiatives like this instill positive feelings in the community that they effect, and fostering this kind of reaction is a cue that advertisers trying to figure out their next guerrilla campaign will definitely want to look into. It is very possible, after all, to communicate a message with a format that simultaneously improves the location it is broadcast from.