Carrier performance ratings are calculated each month and safety ratings are reviewed on a quarterly basis. Regardless of a carrier’s overall on-road performance record, a carrier’s safety rating may not be adjusted when their overall performance threshold is 85% or greater.

Carriers eligible for a safety rating change will have their carrier profile assessed on a case-by-case basis on the quarterly review cycle.

Provincial and territorial governments are responsible for ensuring that their safety rating systems comply with the requirements of the Federal Motor Vehicle Transport Act. Transport Canada monitors the implementation and enforcement of these safety ratings and the Safety Fitness Criteria and Certificates Regulation.