Changeable message signs
By: Conrad L. Dudek.
Contributors: American Association of State Highway and Transportation Officials.; United States. Federal Highway Administration.; National Cooperative Highway Research Program.; National Research Council (U.S.). Transportation Research Board.
Series: Synthesis of highway practice,; 237
Publisher: National Academy Press
Published: 1997
Place of publication: Washington, D.C
Language: eng
Number of pages: 57
Subjects: Traffic signs and signals.
Notes: Includes bibliographical references (p. 47).
"Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration."
"National Cooperative Highway Research Program."