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Speed bumps do a good job of penalizing non-speeders as much as speeders, and they typically force drivers to travel well below the speed limit. With that in mind, inventor Gwyn Harvey came up with a radar-activated speed bump design that would only deploy to slow drivers traveling at an unreasonable speed. The so-called 'Selective Road Humps' would likely cost a great deal more than regular speed humps, but could theoretically be justified in busy subdivisions and residential areas. Animated video after the jump...