TRAFFIC SIGNALS, THE MUTCD AND INTERSECTION SAFETY: DOING MORE THAN THE MINIMUM

This chapter on traffic control devices is from a set of conference proceedings on Intersection Safety: Achieving Solutions Through Partnerships (held in March 2004, Irvine, California). The author introduces the Federal Highway Administration (FHWA) Manual on Uniform Traffic Control Devices (MUTCD), then describes some of the measures exceeding MUTCD standards that agencies should consider applying more liberally at their signalized intersections. The author contends that MUTCD sets minimum standards that, far too often, agencies strive to meet but very rarely exceed, even though doing more than the minimum can significantly reduce intersection-related crashes. Topics include street markings, traffic signal components (including size and placement considerations), and traffic signs, including lane signs and street name signs. Recent changes and additions to Part 4 of the MUTCD to further enhance intersection safety are also described, as are emerging new ideas and technology that may make signalized intersections operate even more safely in the future. Full-color photographs provide illustration of some of the recommended techniques.