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FHWA Home / Safety / Intersection / Intersection Safety

Intersection Safety

General Resources
Statistical Analysis Resources

General Resources

Driver Attitudes and Behaviors at Intersections and Potential Effectiveness of Engineering Countermeasures, FHWA-HRT-05-158, March 2006. [HTML, PDF 289KB]
Research was conducted to provide FHWA with information about key attitudes and behavioral influences in intersection driving performance, perceptual and cognitive bottlenecks, and constraints that can have a negative impact on intersection safety. The research also addresses engineering or educational countermeasures for intersection safety that have the greatest likely impact on performance and safety. This research includes a task analysis of driver performance at intersections, a literature review on human factors research as it relates to highway infrastructure and focus group discussions that explore driver attitudes and behaviors at intersections.

Innovative Intersection Safety Improvement Strategies and Management Practices; A Domestic Scan, FHWA-SA-06-016, September 2006.
A primary objective was to identify and document selected innovative intersection treatments implemented at intersections in the United States and that demonstrate, or have the potential to improve safety at intersections. Another objective was to identify and document selected comprehensive safety processes and procedures that have been implemented by transportation agencies specifically to improve transportation safety. The five locations visited during this scan were: Southeastern, Michigan; North Central, Texas; North Central, Oregon; Charlotte, NC; and West Palm Beach, FL. This report provides a discussion on the successes and challenges to enhancing safety for highway users.

Interactive Highway Safety Design Model (IHSDM)
IHSDM is a suite of software analysis tools for evaluating safety and operational effects of geometric design decisions on highways. IHSDM is a decision-support tool, which evaluates existing or proposed highway designs and provides estimates of a design’s expected safety and operational performance. IHSDM results support decisions made in the highway design process. IHSDM currently includes six evaluation modules (Crash Prediction, Design consistency, Intersection Review, Policy Review, Traffic Analysis and Driver/Vehicle). The Crash Prediction Module implements Highway Safety Manual (HSM) Part C predictive methods

Intersection Safety Case Studies

Intersection Safety Implementation

Intersection Safety Individual Guide Sheets
This key sheet and the accompanying intersection safety strategy guide sheets are companions to the NCHRP Report 500 series on strategies to reduce crashes at unsignalized (Volume 5) and signalized (Volume 12) intersections.

Intersection Safety Issue Briefs, Third Edition
This resource is a series of Issue Briefs on various intersection safety-related topics. Many products have developed over the past 5 years to help practitioners evaluate causes of intersection crashes and potential solutions. The issue briefs provide practitioners with a substantial number of references and resources for subsequent review and consideration. The topics that are included within this intersection safety communications kit include:

  1. Introduction
  2. The National Intersection Safety Problem
  3. Traffic Control Devices: Uses and Misuses
  4. Stop Signs
  5. Signals
  6. Engineering Countermeasures to Reduce Red-Light Running
  7. Red-Light Cameras
  8. Intersection Safety Countermeasures
  9. Pedestrian Safety
  10. Older Road Users
  11. ADA Considerations at Intersections
  12. Human Factors
  13. Access Management
  14. Roundabouts
  15. Road Safety Audits
  16. Work Zones
  17. Resources

Intersection Safety Needs Identification Report
This report identifies needs in developing and achieving safety performance through enhanced activities that can reduce crashes and their impacts—specifically the fatalities and serious injuries associated with intersection safety within their jurisdictions.

Intersection Safety Technologies

  • Stop-Controlled Intersection Safety: Through Route Activated Warning System, FHWA-SA-11-023, May 2011
    An infrastructure-based Intelligent Transportation System (ITS) used to help reduce the potential for and severity of crashes.

  • Advanced Dilemma-Zone Detection System, FHWA-SA-09-008, May 2009
    This system enhances safety at signalized intersections by modifying traffic control signal timing to reduce the number of drivers that may have difficulty deciding whether to stop or proceed during a yellow phase.

  • Embedded LEDs in Signs, FHWA-SA-09-006, May 2009
    LEDs in sign faces that improve safety at intersections by enhancing driver awareness of traffic-control signs.

  • LED Raised Pavement Markers, FHWA-SA-09-007, May 2009
    These pavement markers improve the safety of intersection approaches, as well as pedestrian, bicycle and other crossings. These markers enhance delineation and driver awareness, especially in low visibility conditions.

  • Rectangular Rapid Flash Beacon (RRFB), FHWA-SA-09-009, May 2009
    RRFB can enhance safety by reducing crashes between vehicles and pedestrians at unsignalized intersections and mid-block pedestrian crossings by increasing driver awareness of potential pedestrian conflicts.

  • Red-Signal Enforcement Lights, FHWA-SA-09-005, May 2009
    Lights that enhance safety at signalized intersections by improving red-light compliance, resulting in a reduction of red-light running violations.

Low-Cost Safety Enhancements for Stop-Controlled and Signalized Intersections
The purpose of this document is to present information on suggested effective, low-cost intersection countermeasures developed using intersection safety research results and input from an intersection safety expert panel.

NCHRP Report 457: Evaluating Intersection Improvements: An Engineering Study Guide, 2001. [PDF 3.33 MB]
This is a guide to the engineering study of intersections having operational problems. It describes a process for evaluating the operational effectiveness of various intersection improvements and also shows how capacity analysis and traffic simulation models can be used to assess the operational impacts of those improvements. Junior traffic engineers, especially, will find the guide enhances the decision-making process and can reduce inappropriate traffic control signal installations. The Texas Transportation Institute developed the report for NCHRP.

Page last modified on June 26, 2019
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