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Friday, Jan. 9, 2026

Do CT commercial drivers have CDLs suspended after a DUI arrest, even without a conviction?

Reginald David, CT Mirror
yes

In Connecticut, a commercial driver can have their commercial driver’s license, or CDL, suspended or disqualified after a DUI arrest in any vehicle, even before a conviction.

For CDL holders, a DUI triggers a criminal court case and an administrative action by the Department of Motor Vehicles.

Under Connecticut’s process, the DMV can suspend a CDL if a driver fails or refuses a chemical test, or if test results show an elevated blood alcohol level. In most cases, the suspension takes effect within about 45 days unless the driver requests a DMV hearing, usually within 10 to 15 days.

A BAC of 0.04% — lower than the 0.08% needed by non-commercial drivers for a DUI — while operating a commercial vehicle can lead to disqualification. Refusing a test typically results in a one-year CDL disqualification, longer if hazardous materials are involved.

This fact brief is responsive to conversations such as this one.

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