Key Intersection Safety Resources

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Intersections are critical components of the highway network. They are essentially “planned points of conflict” where all road users—passenger cars, heavy trucks, motorcycles, bicycles, and pedestrians—must be assigned the right-of-way in an orderly and safe fashion when moving through intersections. The many complexities and safety issues associated with intersections are covered in the publications, CDs, training courses, and technical assistance offered through the Federal Highway Administration (FHWA) listed below.


  • NCHRP Report 500, Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: Volume 5: A Guide for Addressing Unsignalized Intersection Collisions and Volume 12: A Guide for Reducing Collisions at Signalized Intersections
  • Guide Sheets for NCHRP Report 500, Volumes 5 and 12 countermeasures
  • Brochure on NCHRP Report 500, Volumes 5 and 12 countermeasures (FHWA-SA-08-008)
  • Intersection Safety Issue Briefs – December 2009
  • Strategic Intersection Safety Program Guide (FHWA-SA-09-004)
  • Low-Cost Safety Enhancements for Stop-Controlled and Signalized Intersections (FHWA-SA-09-020)
  • FHWA Intersection Safety Implementation Plan Process (FHWA-SA-10-010)
  • Sample Intersection Safety Implementation Plan
  • Innovative Intersection Safety Improvement Strategies and Management Practices: A Domestic Scan (FHWA-SA-06-016)
  • Toolbox on Intersection Safety and Design (FHWA and ITE)
  • Standard safety presentations on general intersection safety, signalized intersections, unsignalized intersections, roundabouts, and red-light running
  • Technical summaries (one-page) on new intersection safety technologies: (1) Rectangular Rapid Flash Beacon (RRFB); (2) Red Signal Enforcement Lights; (3) LED Raised Pavement Markers; (4) Embedded LEDs in Signs; and, (5) Advanced Dilemma Zone Detection System
  • Low Cost Local Road Safety Solutions (ATSSA, NACE)
  • Roadway Safety Tools for Local Agencies – NCHRP Synthesis 321
  • 2002 National Agenda for Intersection Safety
  • Intersection Safety Needs Identification Report – July 2009
  • Comprehensive Intersection Resource Library Version 3 (FHWA-SA-06-001 CD)
  • Desktop Reference for Crash Reduction Factors (FHWA-SA-07-015)
  • Roundabouts: An Informational Guide (FHWA-RD-00-067)
  • Roundabouts brochure: Roundabouts: A Safer Choice (FHWA-SA-08-006)
  • Signalized Intersections: Informational Guide (FHWA-RD-00-067)
  • Red Light Camera Systems Operational Guidelines (FHWA-SA-05-002)
  • Safety Evaluation of Red Light Cameras (FHWA-HRT-05-048)
  • Making Intersections Safer: A Toolbox of Engineering Countermeasures to Reduce Red Light Running (FHWA and ITE)
  • Field Guide for Inspecting Signalized Intersections to Reduce Red-Light Running (FHWA-SA-05-008)
  • Red-Light Running PSAs (audio and video)
  • Updated red-light running portion of the Office of Safety Web site
  • Summary Report on Two Low-Cost Safety Concepts for Two-Way Stop-Controlled, Rural Intersections on High-Speed Two-Lane, Two-Way Roadways (FHWA-HRT-08-063)
  • Synthesis of the Median U-turn Intersection Treatment, Safety and Operational Benefits (FHWA-HRT-07-033 – Tech Brief)
  • Median U-Turn Intersection (FHWA-HRT-09-057 – Tech Brief)
  • Double Crossover Diamond Interchange (FHWA-HRT-09-054 – Tech Brief)
  • Restricted Crossing U-turn Intersection (FHWA-HRT-09-059 – Tech Brief)
  • Displaced Left-Turn Intersection (FHWA-HRT-09-055 – Tech Brief)
  • Displaced Left-Turn Interchange (FHWA-HRT-09-056 – Tech Brief)
  • Quadrant Roadway Intersection (FHWA-HRT-09-058 – Tech Brief)
  • Traffic Performance of Three Typical Designs of New Jersey Jughandle Intersections (FHWA-HRT-07-032 – Tech Brief)
  • Safety Assessment of Interchange Spacing on Urban Freeways (FHWA-HRT-07-031 - Tech Brief)
  • Interchange Safety Analysis Tool (ISAT) Users Manual (FHWA-HRT-07-045)
  • Surrogate Safety Assessment Model (SSAM) Software Users Manual (FHWA-HRT-08-050)
  • Surrogate Safety Assessment Model (FHWA-HRT-08-049 - Tech Brief)
  • Railroad-Highway Grade Crossing Handbook (FHWA-SA-02-007)


  • FHWA provides technical assistance to States in the development of intersection safety implementation plans.
  • FHWA conducts periodic Web conferences involving intersection safety.
  • FHWA provides peer-to-peer technical assistance on roundabouts.


  • Designing and Operating Intersections for Safety (3-days – FHWA-NHI-380074)
  • Signalized Intersection Guidebook Workshop (1-day – FHWA-NHI-380078)
  • Intersection Safety Workshop (1-day – FHWA-NHI-380077)
  • Roundabouts: Designing Intersections for Safety Workshop (1-day –FHWA-NHI-380096)
  • Railroad-Highway Grade Crossing Improvement Program (FHWA-NHI-380005)
  • Interactive Highway Safety Design Model (FHWA-NHI-380071)
  • Low Cost Safety Improvements Workshop (FHWA-NHI-380076)
  • Common Sense Solutions to Intersection Safety Problems – LTAP Training Program CD
  • Application of Crash Reduction Factors (CRF) (FHWA-NHI-380093)
  • Science of Crash Reduction Factors (FHWA-NHI-380094)


  • Technical summaries on roundabouts, mini-roundabouts, and access management in the vicinity of intersections
  • Informational report on six alternative intersection/interchange treatments and accompanying NHI workshop
  • Business plan to bring four advanced/ITS stop-controlled intersection safety technologies to market-readiness
  • Updated Comprehensive Intersection Resource Library CD (Version 4)
  • Nine intersection safety “success stories,” technical summaries, articles, and PowerPoint slides
  • Benefits of roundabouts video for decision makers and others
  • Marketing of available countermeasures to address red-light running
  • Updated NHI training courses on intersection safety and operations and on rail-highway grade crossing safety
  • Enhanced SSAM to compare the safety of alternative intersection treatments and street networks
  • Innovative alternative freeway/expressway interchange treatments
  • Evaluation of mini-roundabouts

For additional information on intersection-related material, visit our Safety Web site at:, or contact Ed Rice, Intersection Safety Team Leader, at (202) 366-9064 or

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Program Contact

Jeffrey Shaw


What's New

Signalized Intersections: An Informational Guide

South Carolina Case Study: Systematic Intersection Improvements

Stop-Controlled Intersection Safety: Through Route Activated Warning Systems

Roundabouts: An Informational Guide, Second Edition (NCHRP Report 672)

Roundabouts Peer-to-Peer Assistance

How to drive a roundabout (WSDOT)

Modern Roundabouts: A Safer Choice


FHWA's Intersection Resources Library CD-ROM

Roundabouts Technical Summary

Mini-Roundabouts Technical Summary

Access Management in the Vicinity of Intersections Technical Summary

Intersection Safety Case Studies

Intersection Safety Technologies

Presentation: Intersection Safety

Example Intersection Safety Implementation Plan

Intersection Safety Implementation Plan Workshop

Example Data Analysis Package and Straw Man Outline