CSA, IRT and trucking

Item response theory is viewed as a better way to identify “cultural weaknesses” that create higher crash risk among trucking companies.

Back in June, the National Academies of Sciences, Engineering, and Medicine (NAS) issued a long-awaited report that analyzed the Compliance, Safety, Accountability or CSA program introduced by the Federal Motor Carrier Safety Administration seven years ago. The program is supposed to be a more effective way to measure motor carriers safety.

That 130-page contained what Steven Bryan, president of software developer Vigillo, called a “laundry list” of issues concerning the statistical models within the CSA program’s safety measurement system (SMS) which are then used to craft motor carrier safety scores.

During a presentation at the 2017 American Trucking Associations (ATA) annual conference in Orlando, FL, this week, Bryan and Joe DeLorenzo, FMCSA’s director of the office of compliance and enforcement, explained that the agency is going to use a new analytical “tool” to help improve the CSA safety scoring system over the next two years – a tool called “item response theory” or IRT.

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