Night legibility distances of highway signs
1959
S. 33 - 40
Ill.
Book
English
Engineering Index Backfile | 1947
|Effect of letter width and spacing on night legibility of highway signs
Engineering Index Backfile | 1956
|Effect of letter width and spacing on night legibility of highway signs
Engineering Index Backfile | 1956
|LEGIBILITY OF URBAN HIGHWAY TRAFFIC SIGNS USING NEW RETROREFLECTIVE MATERIALS
British Library Online Contents | 2010
|Legibility Distances of Smaller Letter Light-Emitting-Diode Changeable Message Signs
British Library Conference Proceedings | 2005
|