392.71(a) Radar Detector Citation: Q&A Guide

No. A 392.71(a) citation will not place your truck out of service. Our inspection records show a 0.0% out-of-service rate for this violation across all 2,232 all-time citations in our database. While the national average OOS rate across all FMCSR codes is 31.4%, radar detector violations are consistently cited as moving violations without immediate removal from service. You can continue operating, but you will need to address the citation through your carrier's compliance process.

392.71(a) is one of the least-cited violations in its category. Across our 13 million inspection records, we've recorded only 2,232 all-time citations for radar detector use—ranking it #515 of 3,036 FMCSR codes by citation volume. By comparison, the most common violation in the Unsafe Driving category, 392.2 (operating while ill or fatigued), has over 1.2 million citations. The 0.0% OOS rate for 392.71(a) versus the 0.8% rate for 392.2 indicates this is treated as a lower-severity equipment violation.

Take these immediate steps: (1) Document the citation details and inspection date; (2) notify your fleet manager or carrier immediately; (3) if you own the radar detector, remove it from the vehicle; (4) gather proof of removal or compliance if requested; (5) contact your carrier's compliance or legal team about next steps for addressing the citation. Because this is an equipment-based violation, compliance is straightforward—remove the device. Your carrier may request documentation that the equipment has been removed before the next roadside inspection.

Enforcement of 392.71(a) has halted entirely. Our database shows zero citations in the last 12 months and zero citations in the last 90 days, despite 2,232 all-time citations on record. This dramatic drop suggests either a shift in enforcement priorities or a reduction in radar detector use among commercial fleets. If you received a citation, it was from an older inspection; current compliance focus appears to have moved toward other Unsafe Driving violations like operator fatigue.

Yes, you can challenge this citation through the FMCSA's DataQs (Comply, Adjust, Correct, Quality) system. Since 392.71(a) is an equipment-based finding—not a subjective judgment—contestability depends on whether the inspector correctly identified a radar detector on your vehicle at the time of inspection. You'll need to submit evidence: photographs, repair records, or testimony that the device was not present or was not in use. Work with your carrier's compliance team to file the DataQs request within the allowable window.

Freightliners and Peterbilts dominate the citation data. Our records show FRHT (Freightliner) vehicles with 198 citations, PTRB (Peterbilt) with 158, and FREIGHTLIN with 150—together accounting for a large share of the 2,232 total citations. These high-volume OEM citations likely reflect fleet size rather than inherent violation risk. KW (Kenworth) and UTIL (Utility) vehicles also appear frequently, suggesting the violation is relatively distributed across major manufacturer classes.

United Parcel Service Inc (USDOT 21800) has the highest citation count with 14 citations across our 13 million inspection records. High Speed Demand Inc (USDOT 3345452), Laut Transportation Inc (USDOT 2532266), and R & H Trucking LLC (USDOT 1819975) each have 5 citations. These carriers account for a small fraction of the 2,232 total citations, indicating the violation is spread widely across the industry rather than concentrated in a few operations.

A 392.71(a) citation will be recorded in your driving history and reported to the FMCSA, but the CSA impact depends on your carrier's specific violations and your state's CSA scoring methodology. This violation falls under the Unsafe Driving safety category, which is one of seven CSA BASICs that carriers monitor. The weight of this single citation on your overall score is typically lower because the 0.0% OOS rate reflects its classification as a non-critical safety violation. Ask your carrier's safety department for your specific point allocation.