The purpose of this legislation is to improve safety in the transportation industry by allowing the submission of positive hair drug test results to the Drug and Alcohol Clearinghouse managed by the Federal Motor Carrier Safety Administration. This aims to enhance the monitoring of drug use among commercial drivers and ensure that those who test positive are properly tracked. Key provisions of the legislation include the requirement for motor carriers, which are companies that operate vehicles weighing at least 10,000 pounds, to submit records of positive hair drug test results.