This kit, aimed at couriers and delivery drivers with safety in mind, will integrate with a embedded computer on your bike and show everyone exactly how fast you’re going using electro-luminescent wire.
You’ve got to build it yourself, but it’s not too tough if you’ve ever soldered before and you know which end of a needle is the sharp one. It’ll apparently run for up to six hours on a single AA battery.
Rather than enhancing safety though, I can only see this increasing accidents as people race each other to see who can get the highest number on their back. Hit the jump to see a video of it in action.