Global Warning Signal Integration as a Tool for Work Zone Safety and Efficiency

Theodore E. Cohn, Joseph E. Barton, Daniel S. Greenhouse and Kent B. Christianson

Institute of Transportation Studies, Research Reports, Working Papers, Proceedings from Institute of Transportation Studies, UC Berkeley

Abstract: A work zone (WZ) is visually confusing, and while no WZ looks like any other, they all share a common feature. All of them present an array of flashing light signals which are especially prominent at night. These signals ignite with no relation to one another. Each, by itself, is designed to be highly visible, attention-getting and salient, being positioned high on vehicles, along barriers and on other equipment. In this two-part study we investigated ways to make the overall visual appearance of a WZ more compatible with the needs of passers-by. The first part consisted of psychophysical tests to assess the effect on lane keeping ability when the WZ signals were ignited synchronously, as opposed to asynchronous ignition. The second part investigated the feasibility of using wireless communication to coordinate light ignition times and to create coherence among the warning lights. The feasibility of triggering the signals in sequence to create a visible pattern that is instructive to the passing driver was also considered.

Keywords: Engineering; Work Zone; Work Zone Conspicuity; Work Zone Lighting (search for similar items in EconPapers)
Date: 2006-03-01
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