The Federal Motor Carrier Safety Administration (FMCSA) has requested public comment on an application for exemption submitted by The Trucking Alliance that would allow trucking companies to use hair testing in addition to urine testing for random drug tests and pre-employment screenings. The exemption also asks that carriers be allowed to publish the results of those tests into the FMCSA’s Drug and Alcohol Clearinghouse, a database that employers must review when hiring a driver and annually during employment.