Intelligent transportation systems in work zones :
a cross-cutting study : integrated work zone systems for improving travel conditions and safety.
Washington, DC : Federal Highway Administration, 
intelligent transportation systems
work zone safety
work zone traffic control
Roads > Roads / United States > Roads / United States / Maintenance and repair > Roads / United States / Maintenance and repair / Safety measures.
"FHWA-OP-02--25"--P.  of cover.
 p. in various pagings :
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