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Limitations and Uses of Safety Measurement System Data for Assessing Motor Carrier Safety

Pursuant to the Explanatory Statement accompanying “The Consolidated and Further Continuing Appropriations Act, 2015” (Public Law 113-235) and 
House Report 113-464 accompanying House Bill 4745

October 2015

House Report 113-464 requested the Federal Motor Carrier Safety Administration (FMCSA) to conduct a formal analysis that specifically identifies the limitations in data used to calculate Safety Measurement System (SMS) scores as well as limitations in resulting SMS scores. The report further directs that such analysis shall identify, for each purpose for which SMS scores are used, what data sufficiency standard is necessary to ensure the SMS is reliable enough to serve that purpose. The report also directs FMCSA to demonstrate that any use of data, including the SMS, to determine a carrier’s fitness to operate has adequately accounted for data limitations.

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