HC Deb 29 July 1942 vol 382 c533W
Mr. Gledhill

asked the Parliamentary Secretary to the Ministry of War Transport whether any appreciable economy would accrue if all traffic lights were switched off at 11 p.m. until dawn; whether any cities or towns are now doing this; and with what result?

Mr. Noel-Baker

It is estimated that if all traffic lights were extinguished from 11 p.m. until dawn, there would be a saving of something like 2,500,000 units a year. Against this would have to be set the danger to traffic that would result, unless some other form of control were introduced, and the loss of man-power that would be involved. I understand that in a few towns all traffic lights are switched off during the black-out hours and that in many others some signals have been shut off altogether, while others work only over a reduced number of hours. Local authorities have recently been asked to consider what further economies it is desirable that they should make.