They shorten the yellow light interval to gain more revenue. It's an irresistible corruption when working on a revenue share.

You're taking something that has happened at least once and extrapolating it to every situation; this isn't accurate.

Show me one big city PD that isn't corrupt enough that this is just a minor corruption snack to them.

This is a bizarre comment. What level of absence of evidence would you accept to prove "not corrupt enough?" The "corruption snack" language strongly suggests you aren't really interested in changing your mind even if such evidence could be provided.

If you know of one I would gladly hold it up as a shining example and a template for others to follow. And yet...

welcome to hn