A compliance review (CR) is conducted to investigate potential safety violations, to investigate complaints, or is in response to a carrier’s request for a change in safety rating. The results of the CR may result in the initiation of an enforcement action. It is intended that through education, heightened safety regulation awareness, and enforcement effects of the CR, motor carriers will improve the safety of their commercial vehicle operations and, ultimately, reduce their involvement in crashes.

The report includes all federal and state CRs that were conducted on interstate carriers or intrastate HM carriers and met the model’s data standards. They have been processed at the state level and entered into the Federal Motor Carrier Safety Administration’s Motor Carrier Management Information System (MCMIS). The reported compliance review activity is based on the compliance review date (the date the review was conducted) as opposed to the date a safety rating was issued.

The CR Effectiveness Model is an analytic model designed to measure the effectiveness of the compliance review in terms of crashes avoided, injuries avoided, and lives saved. The model is based on the individual and cumulative “before and after” changes in the safety performance of carriers that received CRs in a given year. The model compares a motor carrier’s crash rate in the 12 months following an on-site compliance review to its crash rate in the 12 months prior to that review. As a result of this methodology and the waiting time for crash reporting, results will not be available until approximately 24 months after the completion of the fiscal year.