Automatic speed warning sign - Hampshire trials
By: by R. D. Helliar-Symons and A. H. Wheeler ; with statistical appendix by P. P. Scott.
Contributors: Wheeler, A. H.
Series: Laboratory reports / Transport and Road Research Laboratory -- 1118; Laboratory reports (Transport and Road Research Laboratory) -- 1118.
Publisher: Transport and Road Research Laboratory, Safety & Transportation Dept., Human & Social Factors Division
Published: 1984
Place of publication: Crowthorne, Berks
Language: eng