Portable changeable message signs at work zones /

Bibliographic Details
Main Author:	Dudek, Conrad L.
Corporate Authors:	Texas Transportation Institute, Texas. State Department of Highways and Public Transportation, United States. Federal Highway Administration
Format:	Government Document Book
Language:	English
Published:	[College Station, Tex.] : [Springfield, Va.] : [The Institute] ; [available through the National Technical Information Service], [1984]
Series:	Research report (Austin, Tex.) ; no. 292-4.
Subjects:	Street signs. Traffic signs and signals. Roads > Design and construction > Safety measures. Roads > Design and construction > Safety appliances. Roads > Maintenance and repair.