'Stop at red' campaign

the-smiling-buddha ask yourself this,if a tree falls in a forest, and nobody's around, does it make a sound?

To answer the question simply define 'sound'.

If by 'sound' you mean an energy wave dissipating through the air, yes a sound is made whether someone is there or not.

If by 'sound' you mean that same energy wave hitting a person's ear drum and being converted to an electrical signal that is detected by the auditory cortex - then there would be no sound.

This question (and its variations) is often set up as some kind of deep-seated profundity, but is in fact a trivial mechanical question that relies on equivocation for it's 'mystery'.

As for the red lights, I am a consequentialist.

My prediction is that as technology becomes increasingly available and people become increasingly accepting of government incursion we will - very likely - have cameras specifically targeting cyclists at lights. Maybe.