This report concerns the specifications of a work zone flagger's vest, for inclusion in the U.S. Manual of Uniform Traffic Control Devices. Related scientific and technical studies were analyzed, current flagging operations were observed and a large number of vest designs were examined under day, dusk, and night viewing conditions. For use during the day, the vest should be constructed of a fluorescent orange material. For night use, white or silver retroreflective tape triming is required. The tape pattern should be recognizable from the front, side and back. To be distinguished as representing a flagger, the tape pattern should outline the flagger's figure. A plan of an acceptable vest is illustrated in the report.

Content Description #Includes bibliographical references and index.