Advertising bikes are a new medium of communication. Bicycle billboards are designed to be fun, exciting, eye catching and respected by the public for the human power required to ride all day long.
One company in Australia has developed Bicycle Billboards as a sustainable form of outdoor advertising they can be directed to a wide variety of markets.
www.spaceads.com.au
But... sustainable isn't just about the fuel used in the vehicle that drives around town. Or the vehicle. It is also about how the signs are made -- do they use environmentally and socially responsible materials and processes? It is also about the safety of the bikers and the other people on the street. And it is about the messages on the signs.
If all those considerations are also carefully and thoughftfully taken into account, bike advertising could be considered respectful messaging.