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Submission + - SignalGuru helps drivers avoid red lights (gizmag.com)

cylonlover writes: The continuing increase in gasoline prices around the world over the past decade has also seen an increase in the practice of hypermiling — the act of driving using techniques that maximize fuel economy. One of the most effective hypermiling techniques is maintaining a steady speed while driving instead of constantly stopping and starting. Unfortunately, traffic lights all too often conspire to foil attempts at keeping the vehicle rolling. Researchers at MIT and Princeton have now devised a system, dubbed SignalGuru, that gathers visual data from the cameras of a network of dashboard-mounted smartphones and tells drivers the optimal speed to drive at to avoid waiting at the next set of lights.
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SignalGuru helps drivers avoid red lights

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Be careful when a loop exits to the same place from side and bottom.