Originally Posted by
Secret Squirrel
An idea.
Using a raspberry pi Zero W and a portable power supply; broadcast a request for Bluetooth pairing that pings people or drivers for Bluetooth connection. This interrupts what they are doing (they look up) and allows you to pass by on your bicycle within the 33 foot range of the Bluetooth signal.
I must not be inderstanding your idea correctly, because what I see happening is exactly the opposite: they will look DOWN at their phone or display screen in their car. It does interupt what they are doing, but most of the time what they are doing is looking at the road where they are supposed to.