Before operating a vehicle that requires a Commercial Driver’s License, all owner operators or employees must complete a pre-employment drug test and return negative results.

Depending on the type of accident and the injuries sustained by those involved, drivers may be asked to take an immediate drug and alcohol tests to determine individual liability.

To remain DOT compliant, both owner operators and employees of transportation companies must join a consortium pool and submit for random drug tests throughout the year.

If an employer has reason to suspect an employee may be under the influence of drugs or alcohol in the workplace, the employee in question may be asked to take a drug or alcohol test.

If a driver has previously tested positive for drugs or alcohol, he or she must first return a negative result on a “return-to-duty” drug test before resuming workplace responsibilities.

Drivers that have successfully completed the return-to-duty process (including a negative return-to-duty test) must be tested several times over the course of the following year.