The most recent brainchild of serial entrepreneur and all around do-gooder Rob Forbes is San Francisco-based PUBLIC Bikes. Well known for founding Design Within Reach, Forbes decided it was time to address his passion for cycling. The quality and style of these bikes clearly demonstrate that he still believes in great design – but this time around he’s taking it to the streets. With a thoughtful brief, Forbes asked 27 designers – including Milton Glaser, Stefan Sagmeister, Maira Kalman and Erik Spiekermann – to each design a poster for PUBLIC Bikes. Frank Viva’s poster is shown below.