Direct answers about hazmat class segregation violations, CSA points, out-of-service risk, and next steps from 13M+ inspection records.
Ranks #2,191 of 3,146 FMCSR codes by citation frequency • OOS rate of 9.1% is below the FMCSR-wide average of 33.3%.
Improper transporting of Class 3 hazardous materials
Direct answers grounded in TruckCodex inspection data
Probably not. Across our 13 million inspection records, 177.837 citations result in an out-of-service order only 9.1% of the time. That's significantly lower than the 31.4% national average across all FMCSR codes. Of the 11 all-time citations in our database for this violation, just 1 led to a truck being placed out of service. Most inspectors cite the segregation failure but allow you to remedy it or continue under specific conditions.
This violation carries a CSA severity weight of 8, meaning it contributes to your Hazardous Materials BASIC score. The actual point load depends on your inspection history in the 30-day window—each citation in that period compounds the score. A single 177.837 hit won't tank your CSA alone, but if paired with other hazmat violations it compounds quickly. Review your FMCSA Safety Management System portal immediately to see your current Hazmat BASIC percentile and trajectory.
Immediate steps:
No, it's among the less-enforced hazmat violations. Our data shows 177.837 ranks #2167 out of 3,036 FMCSR codes by citation volume, with only 11 all-time citations. Compare that to peer violations: general hazmat loading (177.834A) has 3,954 citations with a 99.2% OOS rate, and placarding violations (177.817a) have 2,274 citations with a 75.1% OOS rate. The 9.1% OOS rate for 177.837 confirms it's treated as a compliance issue rather than an acute safety emergency by most carriers and inspectors.
Yes, you can file a DataQs challenge through the FMCSA Safety Management System if you believe the citation is inaccurate or unsupported. You have 90 days from the inspection date. DataQs works best for challenges based on factual errors—e.g., the inspector misidentified your hazmat classes or the segregation distance was actually compliant. If the violation is a judgment call about what constitutes 'proper segregation,' the challenge may be harder to win. Work with your safety manager or carrier's compliance team to build a strong factual record before submitting.
Very rare. Our inspection records show zero citations for 177.837 in the last 12 months and zero in the last 90 days. All 11 citations in our database are historical. This suggests either strong industry compliance with segregation rules or low inspection frequency for this specific violation. If you receive a 177.837 citation, it's unusual—document everything carefully and coordinate with your carrier to understand the inspector's specific segregation concern.
Our data shows 177.837 citations are highly scattered: each of the top 10 carriers cited—including Rosehill Gardens Inc, Trotter Inc, and Signature Landscape LLC—has only 1 citation on record. No carrier dominates this violation, which aligns with the very low overall citation volume (11 total). This pattern suggests that 177.837 enforcement is not concentrated in any particular segment; it's enforced opportunistically during general hazmat inspections rather than through targeted compliance sweeps.
FMCSR violations follow both the driver and the carrier in the FMCSA Safety Management System. A 177.837 citation appears on your company's Hazardous Materials BASIC score (which affects the carrier's CSA profile) and may appear on your individual driver record if you were operating the vehicle. The compliance impact is shared: your carrier's CSA score affects insurance premiums and audit risk, while your safety record influences future hiring decisions at other carriers. Work with your carrier's safety team to correct the violation promptly.
TruckCodex aggregates official public-sector datasets. See the Source registry for dataset-level coverage and the Freshness log for last-import timestamps.
Census, SAFER, SMS, Licensing & Insurance (L&I), roadside inspections, crashes, and authority history.
Vehicle recall campaigns, defect investigations, and consumer safety complaints (SCRS).
Cross-border carrier registry and Canadian recall campaigns where applicable.
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