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Volume 12: A Guide for Reducing Collisions at Signalized Intersections

Making Signalized Intersections Safer

Although intersections are but a small part of the overall highway system, they are the point at which traffic movements most often conflict with one another. As a consequence, nearly 25 percent of all fatal crashes occur at intersections, and about 30 percent of those are at intersections controlled by signals. Fatal crashes at signalized intersections are predominantly multi-vehicle incidents, with 85 percent of them occurring in urban areas.

Objectives

  • Reduce frequency and severity of intersection conflicts through traffic control and operational improvements.
  • Reduce frequency and severity of intersection conflicts through geometric improvements.
  • Improve sight distance at signalized intersections.
  • Improve driver awareness of intersections and signal control devices.
  • Improve driver compliance with traffic control devices.
  • Improve access management near signalized intersections.
  • Improve safety through other infrastructure Treatments.

 

Download this guide: http://gulliver.trb.org/publications/nchrp/nchrp_rpt_500v12.pdf

NCHRP 500-12
Signalized Intersections

Good geometric design combined with appropriate traffic controls can result in intersections that operate efficiently and safely. This guide focuses on reducing fatalities at signalized intersections through low-cost, short-term improvements. It provides strategies that include comprehensive design features, as well as traffic operational and enforcement factors, and improved emergency response measures, such as signal preemption.

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View the Guide and Appendices in HTML

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Signalized Intersections One Pager

Self Assessment Tool

Integrated Safety Management Process