A Guide for Reducing Collisions at Signalized Intersections (2004) / Chapter Skim
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I-1 SECTION I Summary Introduction One of the hallmarks of the AASHTO Strategic Highway Safety Plan (SHSP) is to approach safety problems in a comprehensive manner.
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General Description of the Problem Intersections constitute only a small part of the overall highway system, yet intersectionrelated crashes constitute more than 20 percent of fatal crashes. It is not unusual that crashes are concentrated at intersections, because intersections are the point on the roadway system where traffic movements most frequently conflict with one another.
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SECTION I -- SUMMARY • 29 percent of fatal crashes at intersections occurred at signalized intersections, • 84 percent of fatal crashes at signalized intersections occurred in urban areas, and • 59 percent of fatal crashes at signalized intersections involve angle collisions with other vehicles. I-3 EXHIBIT I-2 Manner of Collision for Fatal Crashes at Signalized Intersections Source: 2002 FARS data.
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turning movements at the intersection, restrict or eliminate turning maneuvers, and close or relocate intersections. • Improve sight distance at signalized intersections -- Provision of clear sight triangles in each quadrant of an intersection can minimize the possibility of crashes related to sight obstructions.
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SECTION I -- SUMMARY I-5 EXHIBIT I-3 (Continued) Emphasis Area Objectives and Strategies Objectives Strategies 17.2 B Reduce frequency and severity of intersection conflicts through geometric improvements 17.2 C Improve sight distance at signalized intersections 17.2 D Improve driver awareness of intersections and signal control 17.2 E Improve driver compliance with traffic control devices 17.2 F Improve access management near signalized intersections 17.2 G Improve safety through other infrastructure treatments P = proven; T = tried; E= experimental.
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