What 393.24D means in plain language
When cargo or equipment extends beyond the sides or rear of your trailer, it must be visibly marked and illuminated so other drivers can see it. This is a safety rule: overhanging loads create hazards for vehicles passing you or driving alongside you. Without proper lighting and marking, another driver might clip your load and cause a crash.
The regulation requires you to use lights and reflectors—or other approved markers—on any load that sticks out. The exact setup depends on how far the load projects and the time of day or visibility. During daylight, bright reflective tape or panels may be sufficient. At night, you typically need working lights. If your load projection isn't properly equipped, you're in violation of FMCSR 393.24D.
What our enforcement data actually shows
Across our 13 million+ inspection records, 393.24D is a relatively uncommon citation. All-time, we've recorded 84 citations for this code nationwide. In the last 12 months, that figure was 38 citations, and in the last 90 days, 6 citations. This ranks 393.24D at #1474 out of 3,036 FMCSR codes by citation volume.
Here's the critical part for you: no driver cited for 393.24D in our database has ever been placed out of service. The OOS rate is 0.0%—meaning inspectors treat this as a fixable equipment issue, not an immediate safety threat that grounds your truck. For context, the all-FMCSR average OOS rate is 31.4%, so this code carries considerably less enforcement severity than most violations.
The enforcement pattern suggests inspectors cite this violation when they spot it during routine inspections, but they allow you to continue operating once the load is properly marked or illuminated.
Who gets cited most
Our inspection data for the last 180 days shows Texas accounting for the overwhelming majority of 393.24D citations: 20 out of the citations we tracked. All 20 Texas citations resulted in no out-of-service placement, reflecting the national pattern.
When we look at carriers historically, our records show fleets such as Francisco Ruben Martinez (USDOT 3502344) with 2 citations, followed by several carriers with single citations. The distribution is very broad—no carrier dominates this violation category, suggesting it occurs sporadically across the trucking industry rather than concentrating in one fleet's operations.
How severe is this compared to similar codes
393.24D sits in the Vehicle Maintenance category alongside codes like 393.9 (Inoperable required lamps), which has generated 660,737 citations with a 15.4% OOS rate, and 393.11 (Lighting devices/reflectors), which has 179,734 citations and a 1.8% OOS rate. Both are far more frequently cited than 393.24D.
Another peer code is 393.78 (Windshield condition defective) with 157,894 citations and only a 0.3% OOS rate. Like 393.24D, 393.78 rarely results in out-of-service placement. The pattern across these lighting and visual-hazard codes is consistent: they're treated as correctable defects rather than imminent-safety violations.
How to avoid it
Based on the citations and co-occurring violations in our data, here's what you can do:
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Pre-trip inspection of load projection: Before you leave the yard, physically walk around your loaded trailer. Does any cargo or equipment extend beyond the sides or rear? If yes, verify that it's marked with reflective material (tape, panels, or paint) and that any required lights are present and functional.
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Test all load lights before departure: If your load has working lights (LED or incandescent), flip the switch and confirm they illuminate. Don't assume a light works just because it looks intact. Our data shows fuel-system and brake-related violations often co-occur with lighting issues, suggesting that routine vehicle checks often reveal multiple defects at once.
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Use high-visibility marking tape and reflectors: If you're hauling material that extends outward, cover the edges or edges with DOT-approved retroreflective tape (typically white and red or amber and red for night/day visibility). This is the most reliable, lowest-cost method for daytime and low-speed operations.
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Know your load dimensions: Ensure you're aware of exactly how far your cargo projects. Some carriers and shippers provide specifications; if not, measure it yourself or ask your dispatcher. Knowing the projection distance helps you determine what marking standard applies.
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Inspect after tight maneuvers: If you make sharp turns, back up, or navigate narrow loading docks, take a moment afterward to verify your load markings and lights haven't shifted or been damaged. Movement during transit can knock off tape or break a light wire.
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Pay attention to vehicle maintenance across the board: Our inspection records show that vehicles cited for 393.24D sometimes also had defects in brakes (393.48A), slack adjusters (393.47E), and tire conditions (393.75C). A comprehensive pre-trip walk-around—checking brakes, tires, lights, and load security together—reduces your risk of multiple citations and keeps your vehicle roadworthy.