Development of a Conflict Analysis Methodology Using SSAM
Principal investigator: Reginald Souleyrette
Co-principal investigator: Tom Maze
Student researcher: Joshua Hochstein, 515-294-5642, firstname.lastname@example.org
Start date: 01/01/10
End date: 12/31/11
Report: September 2012, Development of a Conflict Analysis Methodology Using SSAM 2.73 mb (*pdf)
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Sponsor(s):Iowa Department of Transportation
Midwest Transportation Consortium
About the research
The ultimate goal of this research was to provide improved design guidance for J-turn intersections by learning more about the safety and operational consequences of including or excluding certain geometric design features under various traffic volume conditions.
The proposed methodology to accomplish this research objective was to use the VisSim micro-simulation software package in conjunction with Federal Highway Administration (FHWA) Surrogate Safety Assessment Model (SSAM).
Three alternative high-speed rural expressway intersection designs were modeled previously in VisSim and used to accomplish this analysis. This report examines the use of SSAM for performing a conflict analysis, comparing the safety consequences of alternative designs, and developing conflict and/or crash modification factors. A conflict analysis methodology using the SSAM software was developed and refined. The refined conflict analysis methodology is included in this report.