US DOT Implements Key Changes on Drug and Alcohol Testing Standards

As the U.S. Department of Transportation addresses oral fluid drug testing challenges and updates its policies to execute the order, it directs federal agencies to recognize sex based on biological definition and revise related policies accordingly. 

U.S. Department of Health and Human Services-certified laboratories are available to perform oral fluid testing, employers cannot yet utilize this testing in certain situations that require observed collection to be an oral fluid test as opposed to a urine test. 

According to Towards Healthcare, the U.S. drug testing market is projected to experience significant growth, with estimates suggesting the market size will increase from USD 2.77 billion in 2026 to approximately USD 4.65 billion by 2035, representing a compound annual growth rate (CAGR) of 5.9% from 2026 to 2035. Growth is driven by the with rising substance misuse and an increase in global drug use. Post-accident positive drug tests have heightened the demand for legally defensible, rapid, and confirmatory screening, and the shift towards less invasive, quicker, and highly accurate testing methods, such as oral fluid, saliva, and hair testing, alongside rapid on-site testing devices, continues to expand the market's capabilities. 

U.S. DOT Publishes Final Rule 

DOT published a supplemental NPRM and also proposed to replace the word “gender” with “sex” and also proposing to amend Part 40 for an interim period to permit directly observed urine collections in certain situations where oral fluid collection is not yet available. This ensures safety-sensitive transportation employees who continue to be tested effectively while the oral fluid testing infrastructure is not yet fully established. 

DOT now permits directly observed urine collections that require a directly observed oral fluid test instead of urine, such as when a same-sex observer could not be provided. It helps preserve testing integrity and deters illicit drug use until oral fluid testing becomes available. 

Oral Fluid Testing Requirements: It requires at least two HHS-certified oral fluid laboratories to exist, a qualified oral fluid collector to be available, conforming oral fluid collection device to be present at the collection site. 

A recent report by Towards Healthcare highlights that the U.S. drug testing market is witnessing growth due to high-resolution mass spectrometry, which remains the gold standard for lab testing, holding the largest revenue share. Point-of-care, on-site, and rapid testing kits represent the fastest-growing segment in the country, and with government initiatives to combat opioid and substance misuse, continue to provide lucrative public sector contracts.