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Warning signs and advisory speed signs :
reevaluation of practice /
prepared by Helmut T. Zwahlen (Department of Industrial and Systems Engineering, College of Engineering and Technology, Ohio University).

Description

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Related Names: Zwahlen, Helmut T.
Language(s): English
Published: Athens, Ohio : The Department ; 1983]
Subjects: Traffic > Traffic / Speed > Traffic / Speed / Regulation.
Traffic signs.
Speed limits > Speed limits / United States > Speed limits / United States / States > Speed limits / United States / States / Evaluation.
Traffic signs and signals > Traffic signs and signals / United States > Traffic signs and signals / United States / States > Traffic signs and signals / United States / States / Evaluation.
Note: "June 1983."
Cover title.
Physical Description: xi, 174 p. : ill., charts ; 28 cm. + executive summary (i, 3 p.)
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