HC Deb 16 July 1941 vol 373 c621W
Mr. Ammon

asked the Parliamentary Secretary to the Ministry of War Transport why the authorisation given on 17th June, 1940, by his Ministry for either the upper or lower half of each traffic light signal lens to be shown during the day-time so as to render the signals more conspicuous has not been implemented?

Colonel Llewellin

The authorisation given on 17th June, 1940, was permissive. As I explained on 1st July, in answer to a Question by my hon. Friend, there are considerable practical difficulties involved in the general adoption of the half face signal.