DOT is proposing to amend drug testing regulations to allow oral fluid testing.  This would give employers a choice to help combat cheating on urine drug tests and provide a more economical, less intrusive means of achieving their safety goals.  The proposal also updates other provisions and is intended to harmonize mandatory oral fluid testing guidelines established in 2020 by the US Department of Health and Human Services.  You can read the new proposal here.
 
One advantage of oral fluid collection is that it will be directly observed, as opposed to most urine collections, which are unobserved.  Also, there is no need to find a local lab since oral fluid testing can be administered in-house by a trained individual.  Likewise, the turnaround time for oral fluid test results is much less than a urine test.  Comments on the proposal will be accepted through March 30th.