What 392.5A2-DETECT means in plain language
This citation means an officer detected alcohol in your system—either through a breath test showing measurable alcohol concentration, or through observable signs of alcohol presence—while you were on duty, operating a commercial motor vehicle, or in physical control of one. "On duty" includes time spent inspecting, servicing, or attending to your vehicle, not just active driving.
The regulation is absolute: there is no legal threshold below which you're safe. Any measured concentration or detected presence violates the rule. This is far stricter than drunk-driving laws for passenger vehicles, which typically allow a blood alcohol content (BAC) of 0.08% or sometimes higher.
If you were cited, an officer either administered a breath or blood test that registered alcohol, or documented observable signs of impairment while you were on duty or in control of the vehicle.
What our enforcement data actually shows
Across our 13 million+ roadside inspection records, 392.5A2-DETECT has been cited 112 times historically, with 59 citations in the last 12 months and 11 in the last 90 days. The code ranks #1385 out of 3,036 FMCSR codes by citation volume—it's uncommon relative to many other violations, but when it occurs, the consequences are severe.
Our data shows a 99.1% out-of-service (OOS) rate for this violation across all-time records: 111 drivers were immediately removed from service, with only 1 not placed OOS. This rate is far above the all-FMCSR average of 31.4%, reflecting the zero-tolerance enforcement posture on any alcohol presence while operating or in control of a commercial vehicle.
In the last 12 months, the monthly trend shows fluctuation between 2 and 8 citations per month. July and August 2025 each saw 8 citations, followed by a decline to 2–4 per month in May and February–March.
Who gets cited most
Our inspection records show the top three states with citations in the last 180 days are North Carolina (9 citations, 100.0% OOS rate), Texas (9 citations, 100.0% OOS rate), and Iowa (8 citations, 100.0% OOS rate). Illinois had 1 citation with a 100.0% OOS rate. All jurisdictions in our data enforced this violation consistently: every single case resulted in out-of-service placement.
Across all-time records, New Prime Inc (USDOT 3706) appears most frequently in our database with 2 citations, while nine other carriers including Heyl Truck Lines Inc, Paschall Truck Lines Inc, J B Hunt Transport Inc, Federal Express Corporation, US LBM Logistics LLC, Dart Transit Company, Epes Transport System LLC, Wooster Motor Ways Inc, and Grand Island Express Inc each have 1 citation. Our data shows these fleets have encountered this violation; this reflects the fact that alcohol-related on-duty conduct can occur across any carrier, regardless of size or safety reputation.
How severe is this compared to similar codes
Within the Controlled Substances/Alcohol category, peer codes with similar enforcement patterns include:
392.5(a)(2) — BAC 0.04 or higher: 778 citations, 99.2% OOS rate. This code targets a specific BAC threshold; 392.5A2-DETECT applies to any measurable concentration.
392.5A2-IP — Intoxicating (alternate detection method): 691 citations, 99.0% OOS rate. This code uses slightly different language but targets the same behavior; our data shows near-identical enforcement severity.
392.5A3-IDUI — Driver possession of intoxicating beverage: 1,478 citations, 96.8% OOS rate. Possession alone (not necessarily consumption) is cited more frequently, but has a marginally lower OOS rate.
Compared to drug-related codes like 392.4A-DOSP (3,947 citations, 95.9% OOS rate), alcohol detection draws fewer citations but receives more aggressive out-of-service enforcement when it does occur.
How to avoid it
The primary prevention strategy is straightforward: do not consume any alcohol within 24 hours of being on duty or operating a commercial vehicle. However, our co-occurrence data reveals patterns worth addressing:
-
Do not operate while fatigued or ill. In the last 90 days, 392.2RG (Operating a CMV while ill or fatigued) appeared in 3 inspections that also included 392.5A2-DETECT citations. Fatigue and illness impair judgment and increase risk of substance-related violations. Before each shift, honestly assess your physical condition.
-
Never carry alcohol in your vehicle while on duty. 392.5A3 (possession of alcohol while on duty) co-occurred 3 times. Even sealed containers in the cab or sleeper berth during duty hours are a liability and invite officer scrutiny that may lead to further testing.
-
Ensure you have a valid medical certificate. 391.41APC (operating without a valid medical certificate) appeared in 2 co-occurring inspections. Medical clearance, which includes screening for substance use and health conditions, is foundational.
-
Complete a pre-trip inspection every shift. 396.3A1 (Inspection, repair and maintenance) and 393.9 (Inoperable Required Lamp) co-occurred with recent 392.5A2-DETECT citations. A thorough pre-trip signals professionalism and may reduce officer contact; it also demonstrates you are sober and fit to operate.
-
Understand your vehicle's maintenance state. Our data shows Freightliner (FRHT) vehicles account for 32 citations in this category, with Peterbilt (PTRB) at 14, International (INTL) at 13, and Utility (UTIL) at 12. Regardless of make, an out-of-service vehicle is a red flag for heightened scrutiny.
-
Use a seatbelt every time. 392.16 (failure to use seatbelt) appeared in 2 co-inspections. Minor violations invite officer interaction, which increases the likelihood of alcohol screening if you've consumed anything recently.
Bottom line: if you've been cited for 392.5A2-DETECT, you face an immediate out-of-service order in nearly all cases. Your next steps should include consulting your company's safety department and HR, understanding your carrier's return-to-duty requirements, and making the decision to stay alcohol-free when on duty or operating a commercial vehicle.