What 178.345-14B means in plain language
FMCSR 178.345-14B addresses the DOT406, DOT407, and DOT412 nameplate requirements for hazardous materials transport. When you haul hazmat in a tank truck, the vehicle must display specific DOT identification nameplates. These nameplates identify the vehicle as a regulated hazmat tank and must be properly installed and maintained on the exterior of the tank.
The nameplate isn't just decoration—it's part of emergency responders' ability to quickly identify what type of tank they're dealing with at an accident or roadside inspection. A missing, illegible, or improperly mounted nameplate can delay hazmat response and creates a compliance gap that federal and state enforcement officers catch during inspections.
If you drive a DOT406, DOT407, or DOT412 tank vehicle, you're responsible for ensuring the nameplate is present, securely fastened, and readable before you leave the yard. This is a pre-trip responsibility that takes seconds to verify but can prevent a citation.
What our enforcement data actually shows
Across our 13 million+ inspection records, 178.345-14B is a very low-volume violation. We've recorded 3 all-time citations, with 1 citation in the last 12 months and 1 in the last 90 days. This ranks 178.345-14B at #2551 out of 3,036 FMCSR codes by citation frequency.
The out-of-service rate for this code is 33.3%—meaning one of the three cited vehicles was actually placed out of service. This is slightly higher than the all-FMCSR average OOS rate of 31.4%, but the small sample size limits what we can draw from that comparison. Given the rarity of this citation, if you do get cited, there's about a one-in-three chance the inspector will take the vehicle out of service until the nameplate issue is corrected.
The most recent enforcement activity shows 1 citation in February 2026, which resulted in an out-of-service action.
Who gets cited most
Our inspection data is limited here due to the extremely low citation volume. In the last 180 days, Texas recorded 1 citation for this code, and that citation resulted in an out-of-service placement (100% OOS rate). No other states appear in our recent enforcement snapshot for 178.345-14B.
All-time, we see citations across carriers including Senergy Petroleum LLC, Blanca Esther Alejandro Martinez, and Logice Corp SA de CV—each with 1 citation on record. The cited vehicles included Freightliner, Kenworth, other-brand, and Tremcar tank units. The small sample reflects how infrequently this particular violation is encountered in the field.
How severe is this compared to similar codes
To understand where 178.345-14B sits in hazmat enforcement, compare it to related codes in the hazardous materials category. General loading/unloading hazmat violations (177.834A-HMC and 177.834(a)) generate thousands of citations each—3,954 and 3,839 respectively—with extremely high OOS rates of 99.2% and 97.9%. Placarding violations (177.817(a)) account for 2,274 citations with a 75.1% OOS rate.
By contrast, 178.345-14B sits far below those enforcement levels, which means inspectors encounter nameplate defects much less frequently than placarding or loading violations. Codes like 172.516(c)(6)—placard damaged, deteriorated, or obscured—register 1,796 citations with only a 1.6% OOS rate, and 172.602(c)(1) shows 1,464 citations with 0.0% OOS placement.
The relative rarity of 178.345-14B citations suggests it's either well-maintained across the industry, or inspectors prioritize more visible and higher-risk hazmat violations first.
How to avoid it
Our inspection records show that when 178.345-14B citations occur, they often co-occur with mechanical defects. In the last 90 days, the same inspections that generated nameplate citations also flagged brake tubing/hose inadequacy (codes 393.45B2UV and 393.45DLPC), tire tread/sidewall separation (393.75A2), and fuel system leaks (396.5B-HLOW and 396.5B-HWSLIW). This pattern suggests that nameplate violations tend to appear during inspections that identify broader mechanical neglect.
To avoid a 178.345-14B citation:
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Before every trip, walk around the tank. Visually inspect the DOT nameplate on the tank exterior. Make sure it's present, securely fastened, and readable. Don't drive if you see cracks, rust damage, or loose mounting hardware around the plate.
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Check nameplate readability from 10 feet away. If you can't read the DOT identification from a normal inspection distance, neither will an officer. Clean off dirt or corrosion that obscures the lettering.
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Report loose or damaged nameplates to your dispatcher immediately. Don't wait for a roadside inspection to catch a missing or deteriorating plate. A quick yard repair prevents a citation and keeps the vehicle legal.
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Perform your full pre-trip in sequence. Our data shows nameplate violations cluster with brake and fuel system issues. A thorough walk-around that includes the nameplate, brake lines, tires, and fuel connections catches multiple potential defects before you leave the dock.
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If your carrier operates Freightliner, Kenworth, or other tank units, ensure your maintenance team has a checklist that explicitly includes nameplate condition. The vehicles in our citation sample represent common tank makes—routine attention to nameplate mounting on these platforms prevents escalation to roadside inspection.
The good news: 178.345-14B is rare because most drivers and fleets stay on top of it. A few minutes of visual verification during pre-trip inspection is all it takes to stay in the clear.