Revised Edition based on 2006 ed

Traffic signals are one of the most restrictive forms of traffic control that can be used at an intersection. In order to ensure that the use of traffic signals is limited to favorable situations, practitioners have developed a series of traffic signal warrants to define the minimum traffic conditions that should be present before a traffic signal is installed. This second edition is an update of the first edition, which was originally published in 1998. Since that time, the federal and state traffic signal warrant guidelines have been substantially revised and reformatted. This edition was prepared to provide practitioners with an up-to-date guide on how conduct a signal warrant analysis.