Regulatory Update – February 2023

February 27, 2023

FMCSA proposes to revamp SMS, rejects IRT as ‘overly complex’

FMCSA has proposed substantial changes to the Safety Measurement System (SMS), but the agency decided
against incorporating a sophisticated statistical model based on item response theory (IRT) as recommended
by the National Academy of Sciences in 2017. Although FMCSA developed an IRT model, it found it to be
“overly complex” and less transparent than SMS without improving safety.

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