Catalog Record: Changeable message signs | HathiTrust Digital Library

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Changeable message signs /
Conrad L. Dudek.

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Related Names: Dudek, Conrad L.
Language(s): English
Published: Washington, D.C. : National Academy Press, 1997.
Subjects: Traffic signs > Traffic signs / Changeable message.
Traffic signs and signals.
Note: "National Cooperative Highway Research Program."
Physical Description: 57 p. : ill. ; 28 cm.
ISBN:
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Limited (search only) Northwestern University