Which behavior can lead to disqualification from holding a CDL?

Driving under the influence of drugs or alcohol is a serious violation that can lead to disqualification from holding a Commercial Driver’s License (CDL). This behavior is heavily penalized because it poses a significant risk not only to the driver but also to public safety on the roads. Operating a commercial vehicle requires a heightened sense of responsibility, as these vehicles can be larger and more challenging to control than standard vehicles.

The commercial driving standards are established to ensure that drivers maintain high levels of safety and professionalism. A conviction for a DUI can result in mandatory suspensions or revocations of a CDL, reflecting the zero-tolerance policy that many states and the federal government enforce regarding substance use while driving. This kind of behavior undermines the trust placed in commercial drivers to operate their vehicles safely and responsibly.