In their wisdom (read greed) the South Australian police force installed speed cameras with the traffic light cameras. So now where I once would speed up a little if the lights turned to amber I now slam on my brakes immediately. No doubt this has increased business enormously for crash repairers fixing tailend collision damage. Japan is generally much more sensible, preferring to maintain traffic flow and discourage people from being over touchy about red lights. The speed limits are basically advisory signs here until you get to more than 30 km/h over the limit. On the highways, more like 40 - 50 over.