Tired of having to share the road with cars while you're biking? You're not alone. The marketers at Radwende have built a route-tracing art robot to make a case for more bike lanes in Wiesbaden, a German city frequently considered hostile to pedal pushers. The machine draws the paths of riders who use Android and iPhone tracking apps during their journeys, creating a crowdsourced cycling map whose lines get bolder based on traffic. The more people travel down a given street, the clearer it is that a bike lane is necessary.