The RED/AMBER is standard over here, usually a delay between going RED in opposite direction then RED AMBER & then finaly GREEN, not sure it is any safer, but then again does not make much difference as there are always plenty of red light jumpers, but only on those lights that do not have RED light cameras lol. speaking of which, we have a road near me that I use to visit my step daughter, in 30 miles I think I counted 34 speed cameras of which I believe most are two way detection. that does not include the ANPR (Automatic Number plate recognition) cameras