封面图片

Traffic control devices, visibility, and evaluations

书目详细资料
企业作者: National Research Council (U.S.). Transportation Research Board
格式: 图书
语言:英语
出版: Washington, D.C. National Academy Press 1996.
丛编:Transportation research record no. 1553.
主题:
Traffic signs and signals.
Visibility.
Railroad crossings.
Traffic safety.