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Surrogate Safety Assessment Model

Project Information

Project ID: 
FHWA-PROJ-03-0003
Project Status: 
Completed
Start Date: 
Tuesday, September 9, 2003
End Date: 
Saturday, July 17, 2010
FHWA Topics: 
Safety--Data and Analysis Tools•Highway-Railroad Grade Crossing; Safety--Intersection Safety
TRT Terms: 
Collisions; Intersections; Research; Safety; Traffic Safety; Traffic; Simulation
FHWA Discipline: 
Safety
TRB Subject Area: 
Highways, Research, Safety and Human Factors

Contact Information

First Name: 
Shyuan-Ren (Clayton)
Last Name: 
Chen
Telephone: 
(202) 493-3054
Email Address: 
Team: 
Safety Data and Analysis Team
Office:
Office of Safety Research and Development
Office Code: 
HRDS-20

Project Details

Project Description: 

This project aims to produce a software tool that computes surrogate safety measures from vehicle trajectories that were tested with several widely used traffic simulation models and validated with real crash data.

Goals

Safety of traffic facilities is most often measured by counting the number (and severity) of crashes that occur. It is not possible to apply such a measurement technique to traffic facility designs that have not yet been built or deployed in the real world. The purpose of this project is to develop a software tool for deriving surrogate safety measures for traffic facilities from data output by traffic simulation models.

Deliverables

Deliverable Name: 
Surrogate Safety Assessment Model (SSAM) and Validation: Final Report
Deliverable Type: 
Research report or guidelines
Deliverable Description: 
This document is a final report on research and development of an alternative safety assessment approach utilizing conflict analysis as a surrogate measure of actual crash data.
Deliverable Name: 
SSAM Software User Manual
Deliverable Type: 
Research report or guidelines
Deliverable Description: 
This document is a software user's manual for the Surrogate Safety Assessment Model (SSAM). It provides guidance on the installation and use of the software.
Deliverable Name: 
Surrogate Safety Assessment Model (SSAM) TechBrief
Deliverable Type: 
Techbrief
Deliverable Description: 
This document is a technical summary of the Federal Highway Administration's Surrogate Safety Assessment Model (SSAM) Final Report, FHWA-HRT-08-051. The initial version was developed in May 2008 and further updated in October 2009.