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

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

التفاصيل البيبلوغرافية
مؤلف مشترك: National Research Council (U.S.). Highway Research Board
التنسيق: كتاب
اللغة:English
منشور في: Washington, D.C. Highway Research Board, National Research Council 1973.
سلاسل:Highway research record no. 445.
الموضوعات:
Traffic signs and signals.
Electronic traffic controls.