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Better Bike Turn Signals At Your Fingertips
This: https://lumoshelmet.co/ seems to be the same idea, better executed. Clear delineation between signals, same accelerometer use for the brake light, and wireless remote for signals. The front light is likely less effective for seeing the road ahead, but it still offers high visibility to the drivers ahead of the rider.
My worry is that the left/right signal would look alike from a far in a moving vehicle.
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I'll point out a visual fallacy: in the video a bicyclist initiates their brakes and the 'rear light' turns on to, as the copy says, "warn the vehicles behind that you are braking." But if you have to 'warn' a car that there's a pedestrian crossing the road (that's the visual cue) then you're f****d, because that car should already be braking too.
Watching the video, one of the immediate operational issues is how bright the indicating LEDs are / the material chosen for the diffuser. The light seems to diffuse throughout the entire casing, appearing as if both sides are at least partially illuminated. The sequential cycling of the LEDs (mimicking some modern car indicators) simply isn't defined enough to be effective.
As a regular cyclist in Copenhagen I feel that these are doomed to fail. I only see about 30% of my fellow cyclists giving proper signals and and lights are by law now necessary to be permanently fixed to the bike. The rear light has to be red. This idea clearly comes from a less developed cycling culture and I think the real problem is that proper cycling codes need to be agreed on internationally. For example, not many people know you always need to make junction turns at 90 degrees and not cycle out in the middle of traffic to make a left / right hand turn (depending on your country). Ideally there needs to be cycling instruction and courses (these are offered at schools in Denmark and to people moving here) and ultimately maybe there needs to be a simple test. The best lights are the magnet driven that can be left on the bike, but I do back them up with a removable LED that really brightens up my path.
To a driver passing you at 30mph, a left turning signal that is separated by just a few inches from the other, looks not that much different. Focus on making it bright.