What 392.64-D means in plain language
FMCSR 392.64-D prohibits drivers from riding inside a closed cargo body of a commercial motor vehicle unless there are proper exits available. This rule exists because if your vehicle is in an accident, breaks down, or encounters an emergency while the cargo area is sealed, occupants need a safe way to leave.
The regulation applies to any enclosed cargo space—whether it's a box truck, refrigerated trailer, enclosed auto hauler, or similar vehicle. If you're riding in that space during transport, you must have access to working doors, hatches, or emergency exits that allow you to exit safely and independently. Riding in a sealed compartment with no way out creates an immediate safety hazard.
This is distinct from passenger-seating regulations. You cannot simply sit in the cargo area because it's more convenient or because there's room. The exit requirement is non-negotiable.
What our enforcement data actually shows
Across our 13 million+ inspection records, FMCSR 392.64-D has been cited 21 times all-time, with 10 citations in the last 12 months and 2 in the last 90 days. This ranks 392.64-D as #1921 of 3,036 FMCSR codes by citation volume—making it a relatively uncommon violation.
Critically, none of the 21 all-time citations resulted in an out-of-service order. The out-of-service rate for 392.64-D is 0.0%, which is substantially lower than the all-FMCSR average of 31.4%. This reflects the fact that when inspectors find this violation, they typically issue a citation for the driver or vehicle but do not immediately remove you from service. However, a citation still goes on your record and counts toward your safety profile.
The monthly trend over the last 12 months shows sporadic enforcement: January through March 2026 each had 1 citation, September and November 2025 each had 2, and other months ranged from 0 to 1. This variability suggests enforcement depends heavily on what an inspector observes during a roadside stop.
Who gets cited most
Our inspection records show citations for 392.64-D are geographically dispersed. Over the last 180 days, the top states are Florida, Missouri, New York, Virginia, and Washington—each with 1 citation and 0 out-of-service placements.
No single carrier dominates the violation history. Our data shows individual operators and small fleets across the country have each received one citation: Auto Transport Group LLC, Michael King, Aaron Goodwillie, Professional Contracting and Framing Corp, Nationwide Cargo Incorporated, Moving Express & Storage Inc, Zupa Global Inc, Tiger Style Corporation, USHR LLC, and Warren Transport Inc each appear once in our records.
The top vehicle makes cited include Volvo and Freightliner (3 citations each), followed by Hyundai, International, Ford, and Utility trailers (2 each). Hino, Wabash, Heil, and other manufacturers round out the list. The mix suggests the violation is not concentrated in any particular vehicle type or brand.
How severe is this compared to similar codes
392.64-D sits in the Unsafe Driving category alongside other driver-conduct violations. Comparing it to peer codes reveals significant differences in enforcement volume and consequence.
FMCSR 392.2 (Operating a CMV while ill or fatigued) is the most cited violation in this category, with 1,208,164 citations and a 0.8% out-of-service rate. Variants like 392.2-SLLSR have been cited 191,232 times with a 0.1% OOS rate, and 392.2RG shows 96,652 citations with the same 0.1% OOS rate. Even the least-cited peer codes in this family—such as 392.2-SLLTCD with 85,391 citations—dwarf 392.64-D's volume.
What stands out is that 392.64-D's 0.0% out-of-service rate is at the low end of the spectrum. Most peer codes have OOS rates between 0.0% and 2.4%, but 392.64-D has never triggered an out-of-service order in our database. This suggests inspectors treat it as a correctable driver behavior issue rather than an immediate safety threat to the roadworthiness of the vehicle itself.
How to avoid it
Preventing a 392.64-D citation requires one core discipline: never ride in the cargo area of your vehicle, and do not permit passengers to do so.
When we examined recent inspections where 392.64-D was cited, inspectors simultaneously noted violations in emergency equipment, brake components, and windshield condition. This pattern indicates that rides in closed cargo areas often occur under circumstances where other safety systems may also be compromised. Before you move, run a thorough pre-trip inspection:
- Verify passenger seating. Ensure all occupants are seated in the cab or designated passenger areas with proper doors and windows, not in any sealed cargo space.
- Inspect cargo-area exits. If your vehicle design includes interior access to cargo areas, confirm all doors, hatches, and emergency exits open freely from the inside. Check that mechanisms are not jammed, rusted, or obstructed.
- Know your vehicle layout. For Volvo, Freightliner, and other common makes, familiarize yourself with the exact location of emergency exits. Some older or specialized vehicles may have non-obvious egress points.
- Communicate with your company. If you operate an auto hauler, refrigerated trailer, or enclosed transport, clarify with your fleet manager or dispatch where riders may legally occupy the vehicle. If no interior seating is available, do not exceed the number of cab seats.
- Avoid ride-along temptation. Do not let mechanics, company supervisors, or other personnel ride in sealed cargo areas during transport, even for short distances or low speeds. Accidents and mechanical failures happen without warning.
The citation itself does not carry an out-of-service penalty, but it creates a record. Multiple violations or citations in a short timeframe can flag your safety profile during carrier audits or DOT reviews. The simplest prevention is structural: know where you can legally sit, sit only there, and ensure passengers do the same before wheels roll.