HC Deb 22 July 1959 vol 609 c117W
43. Viscount Hinchingbrooke

asked the Minister of Transport and Civil Aviation whether he will conduct experiments at selected intersections on the volume of traffic passing with the signals in operation and with the signals switched off with a view to ascertaining whether traffic signals are necessary at all hours and whether delay is unnecessary caused by the provision of signals at many intersections

Mr. Nugent

The effect of traffic signals on traffic flow can very frequently be ascertained by methods which do not involve switching off the signals. Vehicle-actuated mechanisms automatically minimise delays when traffic falls off.