• How does a DUI affect my CDL? If you are arrested for a DUI, whether driving a commercial vehicle or a private vehicle, a DUI can affect your commercial license in various ways. If you refuse to submit to a state chemical test to determine your alcohol level, your CDL is disqualified for at least 1 year.
  • How does a DUI affect my CDL if I am driving a commercial vehicle? Your CDL is disqualified for at least a year if you are convicted for DUI while driving a commercial vehicle while there is .04 percent or more by weight of alcohol in your blood.
  • How does a DUI affect my CDL if I have multiple convictions? If you have two or more convictions of DUI your CDL is disqualified for life!