CalmView: Record

Level	Item
Finding No	POL/3/6/5/48
Extent	1 item
Title	Authorisation of masked traffic light signals file
Date	1939-1945
Description	Includes memoranda and correspondence relating to masking of traffic light signals and the method involved (shutters and hinged type screens), hours of operation and the eventual relaxation of the blackout; circular letter from the Ministry of War Transport regarding 'Traffic Control Light Signals', Dec 1944.
AccessStatus	Open