Will Drug Testing Become More Stringent for Truck Drivers?
The U.S. Department of Justice recently moved to reclassify marijuana from Schedule I to Schedule III, prompting concerns from members of the trucking industry. Although the major policy shift does not change the way marijuana is regulated, there’s a sense that its use will become more permissible. However, for truck drivers, nothing could be further from the truth.
A statement from the American Trucking Associations (ATA) asserts that “a safe driver is a qualified driver. And a qualified driver is drug- and alcohol-free.” That being said, the ATA and others continue to pressure lawmakers to use more advanced scientific methods to identify marijuana use among CDL holders.
Problems With Current Methods
During 2025, upwards of 200,000 truck drivers were sidelined due to U.S. Department of Transportation (USDOT) Clearinghouse drug and alcohol violations. Close to one-third of all violations involved the use of recreational marijuana. Although the number of violations remains critically high, some industry leaders argue that many drug users are gaming the system. The issue stems from what appears to be unreliable urinalysis testing.
The first significant hurdle is that urine testing does not necessarily detect the active ingredient in marijuana: tetrahydrocannabinol (THC), the chemical largely responsible for the “high” effect produced from smoking, vaping, or taking edibles. Instead, urine tests analyze and identify non-psychoactive metabolites the body creates when breaking down THC. The window for non-psychoactive metabolites can be as short as three days for infrequent users.
The second problem related to detecting occasional use is that urine testing does not necessarily distinguish between being high or having engaged in marijuana use days before. So, a truck driver could have participated in legal recreational use while on vacation and shown up for work completely sober. Now that marijuana has been downgraded to Schedule III, it may be thought of as more akin to drinking alcohol. A driver can legally drink as long as they are sober when it’s time to get behind the wheel.
What the Trucking Industry Wants
The ATA’s position is that it prefers more accurate drug testing to determine whether a driver should be behind the wheel. The USDOT and Congress are well aware that these advanced methods are available, but have not moved forward with nationwide implementation.
“For far too long, HHS has dragged its feet on implementing science-based drug testing policy, and these bureaucratic delays have come at the expense of safety,” ATA President & CEO Chris Spear reportedly stated. The federal government could have approved oral drug testing for regulatory purposes three years ago, but chose not to.
The trucking industry wants to move away from urine testing and adopt oral and hair testing as the primary methods. Saliva testing, similar to a breathalyzer, provides instant, in-the-moment results regarding drug usage, while hair follicle tests help identify habitual, long-term drug use.
While this may seem harsh, it’s important to remember that today’s THC products are extremely potent, with some causing hallucinations, sickness, and in worst cases, seizures. Drivers should not be experiencing this on the road. It’s not because cargo is in jeopardy but because lives are at stake.
Upcoming Legislation
A recent letter from Congress urged the U.S. Department of Health and Human Services to remove barriers that impede the implementation of saliva and hair follicle testing. The letter goes on to argue that the Food and Drug Administration has proven an obstacle to certifying laboratories to conduct these advanced, more accurate methods. Lawmakers also state that oral fluid and hair follicle tests would minimize the number of specimen substitutions by commercial motor vehicle operators who cheat the system.
Which Drugs Will Be Tested
Beyond alcohol, the USDOT uses the following five-panel drug screening policy to test for:
- Marijuana (THC)
- Cocaine
- Amphetamines/Methamphetamines (e.g., Adderall, MDMA, MDA)
- Opioids (e.g., codeine, hydrocodone, oxycodone, morphine, fentanyl)
- Phencyclidine (PCP)
It’s essential to keep in mind that a wide range of prescription medications can also disqualify CDL holders. For example, benzodiazepines, such as valium and others, cause driver impairment. Anti-depressants, muscle relaxers, and even nicotine patches can result in a failed drug test. As a rule, truck drivers need to check the regulations to ensure they are not using any prohibited substances or medications.
FAQs
When Is Drug Testing Required?
Commercial motor vehicle operators are typically tested when they are initially hired, but may be subjected to random drug testing throughout their careers, especially if employers suspect insobriety.
Can You Take Prescription Medicine?
The short answer is: Usually. However, any medication that could interfere with the safe operation of a motor vehicle is generally prohibited.
Do These Drug Testing Rules Apply to Owner-Operators?
Yes. Drug testing mandates apply to anyone who holds a valid CDL.
What Happens If a Test Is Refused or Results Are Positive?
Any CDL holder who refuses to undergo drug and alcohol testing is subject to suspension. If you decline or test positive for a banned substance, you must complete the return-to-duty process before returning to work or operating your own big rig.
Who Oversees Drug Testing?
The Federal Motor Carrier Safety Administration.
Will Marijuana Still Count Once It’s Reclassified?
Yes. Think of marijuana in terms of alcohol with a twist. Even if it’s legal in your state, you cannot drive while impaired. The caveat is that the FMCSA tests for prior marijuana use as well.
Find More Resources at TSI
The truck and transportation industry continues to evolve, and so, too, must you. Whether you’re just starting your career or you’re already a seasoned driver, it’s important that you stay up to date on industry news, trends, and new legislation.
That’s where TSI can help. Since our founding, we’ve been committed to training and educating both new and experienced drivers. For new drivers, we offer a paid six-week program that teaches you everything you need to know to pass your CDL and take on the road with confidence as an OTR driver. For current CDL holders, check out our blog for industry updates and insights.
