What is a “percentile” under the Compliance, Safety, Accountability (CSA) program?

The CSA's Safety Measurement System (SMS) calculates a “measure” for each of seven Behavior Analysis and Safety Improvement Categories (BASICs). The measure is then used to assign a ranking, or percentile, for each motor carrier that has information that could be compared against other similar carriers. This percentile ranking allows the safety behavior of a carrier to be compared with the safety behavior of carriers with similar operations and numbers of safety events.

The percentile is computed on a 0-100 scale, with 100 indicating the worst performance and 0 indicating the best performance. The carrier in the group with the highest measure will be at the 100th percentile, while the carrier with the lowest measure in the group will be at the 0 percentile. All other carriers in the group will be between these two numbers based on their compliance records.