FMCSR 397.7(b) Hazmat Parking Violation: Driver FAQ

No. Across our inspection records, 397.7(b) citations have resulted in an out-of-service rate of 0.0%—meaning no vehicles have been placed out of service for this violation. All 22 citations in our database were issued as warnings or citations only, with the truck allowed to continue operating. This is dramatically lower than the 31.4% national average OOS rate across all FMCSR codes, making this one of the least likely violations to trigger an immediate roadside shutdown.

A single 397.7(b) citation carries a severity weight of 6 CSA points. Your total CSA impact depends on the 30-day violation accumulation rule: if this is your only violation in the past 30 days, you'll see 6 points added to your record. If you've already received other citations within 30 days of this one, the points stack. The CSA system then applies decay over time—older violations lose impact as they age beyond your compliance window.

Follow these immediate steps:

1. Accept the citation. Document the inspector's name, time, location, and violation description.
2. Review the violation details. Confirm you were parked in an unauthorized hazmat location per DOT regulations.
3. Report to your carrier/dispatcher. Notify them immediately so they can log the event in your safety record.
4. Photograph the scene if safe—location, signage, parking area—for your records.
5. Do not move the vehicle until authorized by your carrier or the inspector.
6. Request a copy of the inspection report within 48 hours.

Since this violation has a 0.0% out-of-service rate, you're unlikely to be stranded, but your carrier will want to know immediately.

Moderately. Across our inspection data, 397.7(b) ranks #1898 of 3,036 FMCSR codes by citation volume—making it quite rare (only 22 all-time citations). However, peer hazmat parking and loading violations are far more severe: general hazmat loading/unloading violations (177.834A-HMC) carry a 99.2% OOS rate and have 3,954 citations, while placarding violations (177.817(a)) reach 75.1% OOS and 2,274 citations. Your violation's 0.0% OOS rate means inspectors treat it as a procedural issue, not an immediate safety shutdown—but the underlying hazmat regulations are still serious.

Yes. If you believe the citation is factually incorrect—for example, the location was actually authorized, or the inspector misidentified your vehicle—you can contest it through the FMCSA's DataQs (DataQ Roadside Records) system. You'll need to submit documentation proving the violation didn't occur or was misclassified. Contests based on procedural errors (wrong location recorded, wrong hazmat class) are stronger than those challenging the rule itself. Since 397.7(b) involves a factual location determination, photographic evidence or dispatch records showing authorized parking can support your case. Allow 30–60 days for FMCSA review.

Our inspection records show only 22 citations for 397.7(b) nationwide all-time, distributed across multiple carriers with no single state concentration listed in the top enforcement jurisdictions. The violation is rare enough that no state dominates the citations. The carriers cited include Rogers Cartage Co, Empire Gas Co Inc, and Trimac Transportation Inc, each with isolated incidents. This low enforcement volume suggests either that unauthorized hazmat parking is genuinely uncommon, or that most violations go unreported until a serious incident occurs. Regional patterns depend heavily on local fuel/gas distribution activity.

Low urgency for roadside compliance, but high urgency for prevention. Our data shows zero out-of-service citations in the last 90 days for 397.7(b)—in fact, zero citations in the last 12 months. However, the underlying violation (parking hazmat cargo in an unauthorized location) poses genuine safety and regulatory risk. Your carrier will likely require corrective action documentation and route/parking procedure updates. The real urgency is preventing future citations by ensuring you and your dispatcher understand DOT-authorized hazmat parking areas and never park in truck stops, rest areas, or other non-designated locations when carrying regulated materials.

Both. FMCSA CSA scores track violations at both the driver level (Driver BASIC) and the carrier/company level (Carrier BASIC). A 397.7(b) citation will appear on your personal driving record and your carrier's safety profile. The violation stays on your CSA record for 36 months, affecting your eligibility for employment, insurance, and CSA-tracked safety programs. Your carrier's record is also impacted, potentially raising their insurance costs and audit risk. This dual tracking means both you and your employer have incentive to contest inaccurate citations and prevent recurrence.