What BAC applies to CDL drivers in a CMV?

Illinois enforces a 0.04 BAC threshold for drivers operating a commercial motor vehicle (CMV). Results and refusals can trigger disqualification issues.

Does a DUI in a personal vehicle affect a CDL?

Yes, certain outcomes in a non-CMV vehicle can still impact CDL status and employability.

Is masking allowed for CDL dispositions?

Federal and Illinois rules restrict practices that conceal CDL convictions. Strategies focus on defensibility and lawful resolutions.

Illinois DUI

CDL / Commercial Driver DUI

0.04 BAC in CMV, CMV vs. personal-vehicle rules, and disqualification risks in Cook, DuPage, Will, Kane, and Lake.

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Why CDL DUI Is Different

Lower Threshold

0.04 BAC applies when operating a CMV. Refusals and results can lead to CDL disqualification issues.

CMV vs Non-CMV

Violations in a personal vehicle can still affect CDL employability and status depending on the outcome.

No Masking

Rules limit dispositions that conceal CDL convictions, shaping strategy and negotiations.

Evidence & Defense Angles

Stop basis near scales, terminals, and work zones
Body-cam, dash-cam, and SFST instruction accuracy
Chemical testing records, observation periods, medical factors
Dispatch logs, GPS/ELD data, and route documentation

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Courts We Serve

Cook • DuPage • Will • Kane • Lake

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Cook County

Chicago (Daley Center)
Skokie
Rolling Meadows
Maywood
Bridgeview
Markham

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DuPage County

Wheaton (Main)
Glendale Heights

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Will County

Joliet
Bolingbrook
Plainfield
Frankfort

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Kane County

Geneva
St. Charles
Aurora
Elgin

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Lake County

Waukegan
Park City
Round Lake
Mundelein

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CDL DUI FAQs

Can a CDL be saved after a DUI arrest?

Case posture and defenses drive options; timelines and documentation are critical.

Does a refusal help or hurt CDL status?

Refusals can create separate issues; strategy depends on facts and deadlines.

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