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The Changeable-message concept of traffic contr...

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The Changeable-message concept of traffic control; report of a conference held July 15-16, 1971

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Format: Books
Language: English
Publication: [Washington] : Highway Research Board, National Research Council, [1972]
Series: Special report (National Research Council (U.S.). Highway Research Board) ; 129
Physical Details: v, 48 pages : illustrations ; 25 cm
ISBNs: 9780309020534, 0309020530
OCLC: ocm00482726

Includes bibliographical references.

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Traffic signs and signals.
Electronic traffic controls.

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The Changeable-message concept of traffic control; report of a conference held July 15-16, 1971

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