FMSCSA Safety Program Effectiveness Measurement: Carrier Intervention Effectiveness Model, Version 1.1, Analysis Brief

2016Analysis BriefPDFBriefRRA-16-017-bComplianceMotor carriersSafety programsTrucking safetyInterventionsMotor CarriersSafety and Human FactorsUnited StatesUnited States. Federal Motor Carrier Safety AdministrationUnited States. Federal Motor Carrier Safety AdministrationUS Transportation CollectionThe Carrier Intervention Effectiveness Model (CIEM) provides the Federal Motor Carrier Safety Administration (FMCSA) with a tool for measuring the safety benefits of carrier interventions conducted under the Compliance, Safety, Accountability (CSA) enforcement program. The CSA program includes an array of carrier intervention types that replace the universally-implemented compliance review that was used as part of the previous enforcement model. A major benefit of the new enforcement model will be an improved level of safety in the operation of commercial motor vehicles. Using a phased approach, FMCSA began implementing the CSA program in 2010. During the implementation period, some carriers were still subject to compliance reviews under the earlier enforcement program. The safety impacts of these compliance reviews were previously measured by the Compliance Review Effectiveness Model (CREM). The new model, CIEM, incorporates both compliance reviews and additional intervention types when assessing safety benefits