Traffic lights with magnetic sensors to detect cars and amount of cars waiting work pretty well here in California. Unless you're riding a motorcycle...
Or a bicycle, which makes the lack of an Idaho Stop law even more frustrating.
Yeah. I know some motorcyclists who have gotten off their bike to walk to corner to push the crosswalk button to get the light to change. It may not be 100% legal, but you gotta do what you gotta do.
Now that is crazy, I just look around for cops a dozen times and floor it (carefully).