ew York City Department of Transport have launched a safety education campaign with twelve QR Code signs. In the style of traditional street safety signs each is embedded with a QR Code that decodes as a haiku poem safety message (images below). 144 of the signs will be placed citywide in high-crash locations near cultural institutions and schools.
A nice presentation of research on the use of QR codes/mlearning for informal learning at a zoo. Good discussion about some logistics to consider when dealing with QR codes