" Everyone is against red light cameras or speed cameras, but they work."
You might want to look here:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&ved=0ahUKEwjhl7D49tzWAhVKVWMKHUxEDsUQFgg9MAQ&url=https%3A%2F%2Fwww.nhtsa.gov%2FDOT%2FNHTSA%2FNRD%2FMultimedia%2FPDFs%2FCrash%2520Avoidance%2F2006%2F810580.pdf&usg=AOvVaw1tF6IO9JoFocPZIs9BqGxF
Also keep in mind there have been municipalities who regard red light cameras as a revenue generator. Lengthening the duration of yellow lights offers the same benefits but without an increase of rear-end accidents which are a side-effect of short-timed yellow lights and cameras.