This is the largest and longest 3D street art project in the world, certified by the Guinness Book of Records. It was painted at London’s West India Quays, Canary Wharf in November 2011 by pavement artist Joe Hill (there’s more of his work at that link). The painting covers 1,160 sq m. Here’s a video of it being made. Here’s more 3D pavement art.
There could be many practical applications of this idea. Painting “ice” on the surface of a local road or a picture of children playing might be an effective way of slowing drivers. Then there are the interesting possibilities that might be painted on the street in front of Parliament House…..perhaps a policy black hole? A moral black hole?