What 172.328D means in plain language
When you're transporting hazardous materials, certain vehicles are required to have a manual remote shutoff device installed. This device allows emergency responders or authorized personnel to cut off the flow of hazmat from your tank in a safety-critical situation.
A 172.328D citation means the inspection found that device present on your vehicle, but it was not properly marked with an "Emergency Shutoff" label. The label has to be clearly visible and legible so that in an emergency, someone responding to an incident can quickly locate and operate it without confusion or delay.
This is a labeling and identification requirement—not a mechanical failure of the device itself. The shutoff may be fully functional, but the marking standard was not met.
What our enforcement data actually shows
Across 13 million inspections in our database, 172.328D citations are relatively uncommon. We've recorded 848 all-time citations for this code, which ranks it #760 of 3,036 FMCSR codes by citation volume. In the last 12 months, we logged 396 citations, with 70 occurring in the last 90 days.
The most striking enforcement pattern is the out-of-service rate: zero drivers or vehicles have been placed out-of-service for this violation. All 848 all-time citations resulted in non-OOS write-ups. This stands in stark contrast to the all-FMCSR average out-of-service rate of 31.4%, highlighting that regulators treat this as a documentation and marking issue rather than an immediate safety threat.
Month-to-month variation shows consistent enforcement. In April 2025 we saw 16 citations; by January 2026 that climbed to 53. Over the trailing 12 months, monthly counts have ranged between 16 and 53, indicating steady, sustained inspection focus on this marking requirement.
Who gets cited most
Our inspection records show that Texas dominates enforcement geography. In the last 180 days, Texas accounted for 191 citations with a 0.0% out-of-service rate. Iowa reported 1 citation, also with a 0.0% out-of-service rate. The geographic concentration in Texas reflects the high volume of hazmat transportation through that state.
At the carrier level, our data shows fleets such as Luca Autotransportes Sa de CV (23 all-time citations) and Papali Logistics LLC (18 citations) appearing frequently in this violation category. These numbers indicate recurring compliance patterns rather than one-off incidents, making the marking requirement a meaningful operational checkpoint for any fleet handling hazmat.
How severe is this compared to similar codes
Within the broader hazardous materials category, 172.328D sits at the lower severity end. Compare it to peer codes:
- 172.502(a)(1) (Placarding general requirements) has 1,820 citations with an 18.5% out-of-service rate—a far higher OOS frequency.
- 172.516(c)(6) (Placard damaged, deteriorated, or obscured) has 1,796 citations but only a 1.6% out-of-service rate—similar to 172.328D's enforcement philosophy.
- 177.823(a) (Movement of damaged hazmat packages) has 1,829 citations with a 51.8% out-of-service rate—indicating that violations involving actual hazmat package condition are treated as much more serious.
Your citation for a missing or illegible emergency shutoff label is treated as an administrative/compliance gap. It's not classified as an immediate roadworthiness or operational safety issue like damage to placarding or improper package handling.
How to avoid it
Based on the co-occurring violations and vehicle data in our inspection records, here are concrete pre-trip actions:
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Check all emergency shutoff device labels during your walk-around inspection. Look for the "Emergency Shutoff" marking on any manual remote shutoff device installed on your tank. The label must be legible and not faded, worn, or obscured. If you find it damaged, contact maintenance before departure.
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Inspect brake tubing and hoses at the same time. Our data shows brake tubing/hoses (393.45B2UV) co-occur with 172.328D citations in 12 recent inspections. A thorough pre-trip means checking both hazmat-specific equipment and mechanical systems in one pass.
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Verify lighting and coupling devices during darkness or low-light conditions. Lighting defects (393.9, 393.11) and coupling issues (393.55E) appear together with shutoff device markings in roadside inspections. This suggests comprehensive vehicle audits catch multiple systems at once. Don't skip the lighting walk-around.
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Request a hazmat equipment orientation if you're new to a tank or carrier fleet. Knowing where the shutoff device is, what it looks like, and how it's labeled takes seconds and prevents a citation. If you inherit a vehicle from another driver, confirm label condition and legibility.
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Document label condition in your pre-trip report. If you note a marking defect early and report it, you create a paper trail and prevent an inspector from citing you later. Many carriers will replace a worn label on the spot if you flag it.
King (KW) and Freightliner (FRHT) vehicles appear most frequently in our shutoff device citation data (205 and 202 citations respectively). If you drive one of these common platforms, assume the label may be subject to UV fading or mechanical wear—inspect it more carefully and more often.