The smart thing is to make all the cameras speed and red light camera. Prominently display where such camera are installed. Traffic will get used to this.
Where I live most of the red light cameras have been converted to safety cameras (red light + speed) and you will go through lots of intersections with them. This brings the speed down between cameras as well as reducing the number of accidents at intersections. Traffic actually travels within the speed limit instead of the +10 I often see on US roads.