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Benefit of Using Crash Report in Safety Analysis: Experience in Louisiana

 

Abstract: Crash analysis provides powerful evidence for revealing problems and helps to select the best and most effective countermeasures. The majority crash analysis uses crash database retrieved and integrated from individual crash reports. Although key information such as time, location, and major crash characteristics are obtained from each individual report, not all details concerning a crash are fully represented in the database. This presentation will introduce a study that used individual crash reports as supplement to crash database in evaluating few crash countermeasures in Louisiana. Specifically, the presentation shows how useful the individual crash reports are in roadway safety analysis concerning roundabout, Restricted Crossing U-Turn (RCUT), and urban street lane conversion. In roundabout analysis, individual crash reports helped the research to identify locations of crashes outside of 150 feet of the intersection but intersection-related. The diagram and narratives of crash reports benefited the RCUT analysis greatly on why there is an increase of rear-end collision at one location and why there are increases in single-vehicle crashes in general. Reviewing the crash report developed by enforcement officer at each crash location is very helpful in identifying the potential deficiencies in roadway design, traffic control, and current application policies. Additionally, using crash report helps to discover outdated crash coding problems at relatively new roadway facilities. The current advancement in big data analysis makes crash report analysis in large scale possible.


Xiaoduan Sun - Professor at civil engineering department, University of Louisiana for the past 24 years with specialty in highway safety.

 

 

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