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

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

Bibliographic Details
Corporate Author: National Research Council (U.S.). Highway Research Board
Resource Type: Book
Language:English
Published: Washington, D.C. Highway Research Board, National Research Council 1973.
Series:Highway research record no. 445.
Subjects:
Traffic signs and signals.
Electronic traffic controls.