What must CMV drivers show regarding substance use during their medical certification?

CMV drivers must demonstrate no recent history of substance abuse or dependence to obtain medical certification. This requirement is crucial because the safety of the driver, passengers, and the general public is paramount in commercial motor vehicle operation. Substance abuse can impair judgment, coordination, and reaction times, leading to dangerous situations on the road.

The prohibition of recent substance abuse ensures that drivers are not currently engaged in behaviors that could compromise their ability to operate a vehicle safely. This standard is in line with federal regulations and is part of the overall effort to maintain high safety standards within the commercial driving industry.

Other options may include considerations of past behavior or general documentation related to substance use, but they do not address the immediate necessity of ensuring the driver is currently fit to perform their duties without the risk of impairment.