Because in Chicago, the red light cameras have been timed to turn red sooner than normal traffic lights.
This is old news, there, and it likely has been true across the country in Democrat governed areas.
When in Chicago, I always use a red light camera intersection’s “yellow” to mean an immediate “stop,” when I get there.
You can imagine others do the same, while others double the acceleration. Not a good situation.
If you don’t live in Chicago, you can’t easily fight the ticket and the fine is high.
Because in Chicago, the red light cameras have been timed to turn red sooner than normal traffic lights.