On Feb. 28, the U.S. Department of Transportation (DOT) issued proposed rulemaking to add oral fluid testing as an alternative to urine testing for the federal DOT-regulated drug and alcohol testing program. If finalized, the greater flexibility will better position the trucking industry to curb cheating and improve safety among its drivers.
According to the U.S. Department of Health and Human Services (HHS), oral fluid testing provides the same scientific and forensic supportability as urine...
https://www.freightwaves.com/news/dot-proposes-adding-oral-fluid-testing-for-drugs-alcohol