Actually, almost all traffic lights of Metro Manila ay naka START system na (don't know what that means). Basta it is also the traffic light system used in most of Australia. Meron silang kinabit na mga sensors under the road to monitor which lane have more traffic volume, yung ang i-priority. Ang problema, yung mga jeep, kahit GO na, naka STOP pa rin sila waiting for passengers. Kaya nalilito yung computer.

Also, hindi naman standard yung 30sec na GO, then 30sec na STOP. It depends sa traffic history nung intersection kung aling lanes ang mas kelangan ng longer period of green light or red light. Also, almost always, major or wider roads will tend to have a longer green light than minor roads.