"So the final product is a multi-camera, rear-facing bike-light, which uses object detection and depth mapping to track the cars behind you - and know their x, y, and z position relative to you (and the x, y, and z of their edges, which is important).
What does it do with this information?
It's normally blinking/patterning like a normal bike light, and if it detects danger, it does one of two actions, and sometimes both:
1. Starts flashing an ultra-bright strobe - to try to get the driver's attention
2. Initiates haptic feedback - to let the person riding the bike that they're in danger
3. Honks a car horn. This is if all else fails, and only happens if you are in certain danger"
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*plans (presumably)