Automatic close-following warning sign - further trials
By: by R. D. Helliar-Symons and S. D. Ray.
Contributors: Ray, S. D.
Series: Research report / Transport and Road Research Laboratory -- 63; Research report (Transport and Road Research Laboratory) -- 63.
Publisher: Transport and Road Research Laboratory, Safety and Transportation Dept., Human and Social Factors Division
Published: 1986
Place of publication: Crowthorne, Berks
Language: eng