In a previous post, we began discussing how the Federal Motor Carrier Safety Administration takes the danger posed by impaired driving very seriously, mandating that all drivers licensed to operate commercial motor vehicles — vehicles whose gross vehicle weight rating is over 26,000 or carry more than 16 passengers — submit to a rigorous testing program.

Specifically, we started discussing how the FMCSA permits random drug and alcohol testing of all bus drivers, and mandates drug screening for all prospective bus drivers.

In today’s post, we’ll continue this discussion, focusing on the other types of testing to which bus operators are subject and the testing procedures themselves.

How is the decision about random testing made?

The FMCSA allows for supervisors who have undergone specialized training from the Department of Transportation to order bus drivers holding a commercial driver’s license (CDL) to submit to random testing when they have reasonable suspicion of drug or alcohol abuse.

This decision, however, must be based on direct observation of things like speech patterns, behavior, appearance, odors and other indicia of possible substance abuse.

What happens in the aftermath of a bus accident?

In the event CDL drivers are issued a citation for their involvement in a traffic accident resulting in either personal injuries or vehicle immobilization, they must submit to drug and alcohol testing. Such testing is also mandatory whenever a CDL driver is involved in a deadly crash, regardless of whether they are issued a citation.

The test for alcohol must take place within eight hours of the wreck, while the test for drugs must take place within 32 hours of the wreck.

What happens when a CDL driver is notified of a mandatory test?

The CDL driver must report to the designated testing site within the designated timeframe, or preferably as soon as possible, in order to provide a urine sample.

It should be noted that they have only three hours to produce this sample and that leaving the testing site prior to the completion of the process may be treated as a refusal.

We will continue this discussion in future posts, consider speaking with an experienced legal professional if you or your loved one have had their lives turned upside down in a bus accident caused by a negligent driver or company.

Trial attorney F. Braxton “Brack” Terry focuses his law practice on representing injured people in a wide range of personal injury claims, including cases involving truck crashes, car accidents, defective products, premises liability, and more. His efforts have secured significant verdicts and settlements, including over $20 million for a large group of plaintiffs, and recoveries of $5.3 million, $4.1 million, $3.6 million, $3.1 million, $2.49 million, and high-six-figure amounts for individuals.

Brack has received numerous professional honors from prestigious organizations. Most recently, he was named “Lawyer of the Year” by Best Lawyers® for Personal Injury Litigation in Knoxville in 2026. He has been listed in Best Lawyers® every year since 2013 and by Super Lawyers since 2009. Brack has been a member of the Multi-Million Dollar Advocates Forum since 2007.

Brack earned his law degree from the Nashville School of Law in 1996. In addition to membership in the Tennessee Bar, he is admitted to practice before the U.S. District Court for the Eastern District of Tennessee and the U.S. Court of Appeals for the 6th Circuit. Brack is a member of many professional organizations, such as the Tennessee Trial Lawyers Association, the American Association for Justice, and the Interstate Truck Litigation Group.

Admitted to Tennessee Bar: 1996
Years of Legal Experience: 30
Listed in The Best Lawyers in America®: 2013-Present
Listed as a Mid-South Super Lawyer: 2009-Present