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London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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@nineteenseventytwo
"The system projects a virtual bike lane (using lasers!) on the ground around the cyclists, providing drivers with a recognizable boundary they can easily avoid. The idea is to allow riders to take safety into their own hands, rather than leaving it to the city."
http://www.good.is/?p=14716