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Modern cars often have an extra brake light high on the rear window for safer driving. But where would you mount one on a motorcycle? On the rider’s head, suggests John Cromarty of Bristol.

His simple patent describes a crash helmet fitted with a matrix of several hundred LEDs on the back (GB 2374272). The array is hooked up to a quick-release cable that connects it to the bike’s electrics. Alternatively, the LEDs can be powered by a rechargeable battery and controlled using a wireless link such as Bluetooth. While the bike is cruising the LEDs can display, say, the…

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