What's the problem with traffic cameras? They seem fairer and more effective than discretionary police enforcement.
Lots of stories of yellow light being shortened to create more tickets.
They are a revenue source for a city above all else.
https://ww2.motorists.org/blog/6-cities-that-were-caught-sho...
https://www.salon.com/2017/04/05/this-may-have-happened-to-y...