Traffic signals for high-speed roads
By: by F.V. Webster and P.B. Ellson.
Contributors: Ellson, P. B.; Road ResearchLaboratory.
Series: Road research technical paper -- no. 74
Publisher: H.M.S.O
Published: 1965
Place of publication: London
Language: eng
Number of pages: 49
Subjects: Traffic signs and signals.
Notes: At head of title: Road Research Laboratory.

Bibliography: p. 49.