Motor carrier scores in two of the five public safety categories in the CSA program are "defective" in predicting crash risk, according to a new study by the American Transportation Research Institute. "There is no statistical support for making intended safety inferences based upon the Driver Fitness or Controlled Substances and Alcohol percentile rankings," according to the study. "In fact, carriers with higher scores in these two BASICs seem to present lower crash risks."
The new study of 471,000 fleets' safety measurement data also said that CSA carrier "alerts" from the FMCSA (Federal Moto Carrier Safety Administration) do not consistently identify the riskiest carriers. The study also concluded that in four of the five public BASICs, carriers with an "alert" had crash rates exceeding those of carriers in all other groups. "The one exception was Driver Fitness, where below-threshold carriers posed greater safety risks," the study said.