Full title reads: "Trafalgar Square. 70,000 vehicles daily and not one traffic policeman! Mayor of Westminster inaugurates amazingly, successful 'Go-Stop-Go' automatic lights operated by the traffic itself."
Trafalgar Square, London.
The Mayor of Westminster stands next to small control box for early traffic light system.
A man explains how the traffic controlled system works while we see vehicles driving around the square. MS of traffic lights. More traffic scenes.