What 392.5A3-IDUI means in plain language
FMCSR 392.5A3-IDUI prohibits you from having any intoxicating beverage in your possession while you are on duty or operating a commercial motor vehicle. This applies regardless of whether you actually drank it, opened it, or planned to drink it—possession alone is the violation.
The regulation doesn't require you to be impaired or to have consumed alcohol. A single closed bottle, can, or container of beer, wine, spirits, or any other intoxicating beverage in your truck cab, sleeper berth, or immediate reach constitutes a citation. The intent of the rule is zero tolerance: alcohol and commercial driving don't mix, period.
This is distinct from driving under the influence (which is covered by other codes). You can be cited for 392.5A3-IDUI even if you never took a single sip.
What our enforcement data actually shows
Across our 13 million+ inspection records, we have 1,478 all-time citations for 392.5A3-IDUI. In the last 12 months, we recorded 893 citations; in the last 90 days, 158 citations. This code ranks #610 out of 3,036 FMCSR codes by citation volume—not the most common violation, but far from rare.
The out-of-service rate for 392.5A3-IDUI is 96.8% all-time. This means that of the 1,478 drivers cited, 1,431 were placed out of service immediately. Only 47 received a citation without an OOS order. For context, the all-FMCSR average OOS rate is 31.4%, making this code nearly three times more likely to result in immediate removal from service than the typical violation. Inspectors treat possession of alcohol as a critical safety failure, not a minor paperwork issue.
The trend data shows enforcement has remained steady: we see 59–88 citations per month over the past 12 months, with peaks in May and June 2025 (88 each), and a dip in December 2025 (59). This suggests consistent officer vigilance year-round, with no seasonal leniency.
Who gets cited most
Our inspection records show Georgia leads enforcement volume in the last 180 days with 53 citations, followed by Arkansas with 34, and Tennessee with 21. Georgia's OOS rate is 96.2%, while both Arkansas and Tennessee place 100% of cited drivers out of service. This variation is modest but meaningful: if you're operating in Tennessee or Arkansas and cited for this violation, an OOS order is virtually certain.
Washington (21 citations, 95.2% OOS), Arizona (17 citations, 100% OOS), and Mississippi (17 citations, 94.1% OOS) also show elevated enforcement. The data indicates this violation is caught across the country, not concentrated in one region.
By carrier, our data shows fleets such as Western Express Inc (USDOT 511412) with 6 all-time citations and New Prime Inc (USDOT 3706) with 5 citations for this code. This does not imply systematic negligence; it reflects their size and miles driven. However, for fleet safety managers, these records underscore the need for explicit alcohol-possession policies in driver handbooks and pre-duty briefings.
How severe is this compared to similar codes
Other alcohol and drug possession codes in the same regulatory category show comparable severity. The code 392.5(a)(2)—BAC 0.04 or higher—has 778 citations with a 99.2% OOS rate, slightly higher than 392.5A3-IDUI's 96.8%. The code 392.5A2-IP, which covers actual under-the-influence status with measured or detected alcohol, has 691 citations at 99.0% OOS. By contrast, the code 392.4A-DOSP (use of drugs) has 3,947 citations at 95.9% OOS—far more frequent but marginally lower OOS rate.
In absolute terms, 392.5A3-IDUI (1,478 citations) is cited less often than drug-related codes but more than some specific BAC-threshold violations. The consistency of the 96.8% OOS rate across nearly 1,500 cases shows this is not borderline—it is treated as a hard safety violation by inspectors nationwide.
How to avoid it
The rule is simple: don't possess any intoxicating beverage while on duty or operating a CMV. Here are concrete steps:
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Before you depart the terminal or yard, do a visual sweep of your cab, sleeper, and all storage compartments. Check under seats, in door pockets, behind visors, and in any coolers or bags you're bringing along. A forgotten beer from the previous night or a bottle a shipper placed in your cab creates liability.
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Keep a written alcohol-free declaration policy in your logbook or on your phone. Some drivers photograph their empty cab at the start of each shift. This isn't required, but it creates evidence if challenged.
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Tell shippers and receivers clearly: you will not accept freight that includes alcoholic beverages intended for consumption or that are left unattended in your vehicle. Be specific: "I can transport alcohol as cargo if it is properly documented and sealed in the cargo area, not the cab."
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Don't accept ride-alongs or hitchhikers carrying alcohol. If a co-driver or passenger brings a beverage into the cab, you are in violation regardless of whose it is.
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On co-occurring violations: our data shows that 392.5A3-IDUI frequently appears alongside 392.4A-DOSP (use of drugs, 25 shared inspections in the last 90 days) and 392.5A2-IP (under the influence, 22 shared inspections). This pattern suggests inspectors are often finding multiple substance-related issues in a single stop. A thorough pre-trip inspection—clean cab, clear medical certificate, current logbook, and sober presentation—reduces your vulnerability to any of these citations.
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Vehicle-specific note: Freightliner trucks (330 all-time citations for this code) and Ford (155 citations) are the most frequently cited makes, likely due to their prevalence in commercial trucking. This is not a defect issue, but it does mean those trucks see higher roadside inspection frequency overall. If you operate a Freightliner or Ford, assume stricter scrutiny and be especially vigilant about your cab cleanliness and sobriety.
Once cited, a 96.8% OOS rate means you will almost certainly be removed from service. This is not negotiable. The consequence is lost revenue, delayed deliveries, and a serious mark on your safety record that affects future insurance rates, dispatch priority, and company reputation.