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The Changeable-message concept of traffic control; report of a conference held July 15-16, 1971.
LIBRA HE370 .C47
Available from offsite location
- Format:
- Book
- Series:
- Special report (National Research Council (U.S.). Highway Research Board) ; 129.
- HRB special report 129
- Language:
- English
- Subjects (All):
- Traffic signs and signals.
- Electronic traffic controls.
- Physical Description:
- v, 48 pages : illustrations ; 25 cm.
- Place of Publication:
- [Washington] : Highway Research Board, National Research Council, [1972]
- Notes:
- Includes bibliographical references.
- ISBN:
- 0309020530
- OCLC:
- 482726
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