What 393.11A1-LLPL means in plain language
This citation comes down to one issue: your commercial motor vehicle was on the road without the required lighting devices or reflectors in place and working. Whether something was missing entirely or simply not meeting the standard, an inspector determined your vehicle's lighting setup fell short of what federal regulations require.
The rule covers the full range of required lights and reflective equipment on a CMV — from marker lamps and clearance lights to reflectors mounted on the body and trailer. Inspectors check that everything required by the equipment standards is present, correctly positioned, and functional.
If you're reading this after a roadside stop, the key thing to understand is that this violation is about the physical presence and condition of required lighting hardware — not just whether lights were switched on. Missing or damaged reflectors count just as much as a burned-out lamp in this context.
What our enforcement data actually shows
The first thing most drivers want to know after a citation: am I going out of service? For 393.11A1-LLPL, the answer is no. Across 20,293 all-time citations in our inspection records, the out-of-service rate is 0.0%. Not a single vehicle was placed out of service for this specific code. To put that in perspective, the all-FMCSR average OOS rate across all codes is 31.4% — so this code sits dramatically below that threshold.
That said, the citation volume is substantial. Our database ranks 393.11A1-LLPL at #135 out of 3,036 FMCSR codes by total citation count, which puts it firmly in the upper tier of enforcement activity. Over the last 12 months alone, our inspection records show 12,482 citations issued under this code. In just the last 90 days, inspectors wrote 2,429 citations — a pace that shows this is actively enforced, not a rarely-triggered rule.
Looking at the monthly trend, citation volume has been consistently elevated. The data in our database indicates a spike beginning in May 2025, with monthly counts ranging from 880 to 1,263 citations through early 2026. The enforcement pressure is real and sustained.
The CSA severity weight for this violation is 3. You won't be parked on the side of the road, but the citation does land in your safety measurement system scores and can affect carrier SMS percentiles over time.
Who gets cited most
Across the last 180 days in our inspection records, California leads all states with 762 citations for this code. New York is close behind at 608 citations, and Florida comes in fourth with 502 citations — but it's worth noting that the third slot by raw count is listed under the federal enforcement category with 609 citations. All three of those high-volume states show an OOS rate of 0.0%, consistent with the national picture for this code. There is no material variation in OOS rates across states — the gap between any of them is zero percentage points.
On the carrier side, our data shows fleets such as JESUS PEDRO PEREZ CARRILLO (USDOT 1159851) with 71 all-time citations and TRANSPORTE INTERNACIONAL LOPEZ OCHOA SA DE C V (USDOT 1041907) with 40 citations appearing at the top of our records. These figures reflect the volume of inspections those operations have been through, not a judgment on their practices.
How severe is this compared to similar codes
Within the Vehicle Maintenance category, 393.11A1-LLPL is a relatively low-stakes citation compared to some of its neighbors — but context matters.
The closest peer code by subject matter is 393.11 (Lighting devices/reflectors) with 179,734 citations and a 1.8% OOS rate in our database. That parent code carries a non-zero OOS risk, which underscores that not all lighting violations are treated equally — the specific sub-code you were cited under, 393.11A1-LLPL, has never triggered an OOS placement in our records.
Compare that to 393.9(a) (Inoperable required lamps), which has accumulated 660,737 citations and carries a 15.4% OOS rate. That code covers lamps that are present but not working — a distinction inspectors take more seriously when it comes to putting vehicles on the shoulder. Getting cited under 393.11A1-LLPL instead of 393.9(a) is a meaningful difference in short-term consequences.
Also worth noting: 396.3(a)(1) (Inspection/repair/maintenance - general) shows 236,919 citations and a 45.3% OOS rate — the highest among the peer codes in this category. If an inspector decides your lighting deficiency reflects a broader maintenance failure, that code can come into play alongside yours.
How to avoid it
The co-occurrence patterns in our 90-day data tell you exactly where your pre-trip inspection needs to be tighter. Here's what the numbers point to:
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Walk the full perimeter for lighting hardware, not just function. In our inspection records, 393.11A1-LLPL appears in the same inspections as 393.9A-LIL and 393.9A-LCL (inoperable required lamps) a combined 797 times in the last 90 days. Inspectors are flagging both missing equipment and non-working lamps in the same stop. Check that every required lamp and reflector is physically present and undamaged before you pull out.
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Verify reflectors are mounted and intact, not just assumed to be there. Reflectors get knocked off, painted over, or obscured by road grime. Add a specific reflector check to your walkaround — front, rear, and side positions.
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Carry spares for the lamps most likely to fail. Freightliner vehicles account for 2,656 all-time citations under this code in our database, followed by Ford at 2,118 and International at 1,485. If you're operating one of these makes, know which lamps on your specific unit are highest-failure and keep replacements accessible.
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Check your periodic inspection paperwork. Our data shows 396.17C-PI (no proof of periodic inspection) appeared alongside 393.11A1-LLPL in 556 shared inspections in the last 90 days. If your annual inspection is expired or the documentation isn't in the cab, a lighting deficiency gives inspectors a reason to dig deeper.
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Don't overlook emergency equipment. Code 393.95F (missing or improper stopped-vehicle warning devices) co-occurred in 313 shared inspections, and 393.95A1 (no fire extinguisher) appeared in 310. These are discrete checklist items in your pre-trip — make sure reflective triangles and your extinguisher are present, rated, and secured before every run.
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Address windshield condition at the same time. With 335 shared inspections involving 393.78A-WS (defective windshield condition), inspectors finding one visibility-related issue tend to look for others. A cracked or obstructed windshield during the same inspection compounds your CSA exposure.