Cover image for Changeable message signs
Changeable message signs
Title:
Changeable message signs
Author:
Dudek, Conrad L.
Personal Author:
Publication Information:
Washington, D.C. : National Academy Press, 1997.
Physical Description:
57 p. : ill. ; 28 cm.
Series:
Synthesis of highway practice, 237
Series Title:
Synthesis of highway practice, 0547-5570 ; 237
General Note:
"Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration."

"National Cooperative Highway Research Program."
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