Traffic signals 5 reports ; prepared for the 52nd annual meeting.

Traffic signals 5 reports ; prepared for the 52nd annual meeting.

书目详细资料
企业作者: National Research Council (U.S.). Highway Research Board
格式: 图书
语言:English
出版: Washington, D.C. Highway Research Board, National Research Council 1973.
丛编:Highway research record no. 445.
主题:
Traffic signs and signals.
Electronic traffic controls.