390.9-SLL Citation: What Happens Next?

No. Across our inspection records, 390.9-SLL citations resulted in out-of-service placement in only 3 out of 1,342 all-time cases—a 0.2% OOS rate. The vast majority of drivers cited for this violation continue operating immediately after the citation. This is far below the all-FMCSR average OOS rate of 31.4%, making 390.9-SLL one of the least likely violations to trigger an immediate roadside shutdown.

390.9-SLL ranks #638 out of 3,036 FMCSR codes by citation volume, indicating it is relatively uncommon. Its 0.2% OOS rate places it well below the typical severity threshold—most administrative or documentation violations in the same category (like 390.21TB2-DOT with 74,663 citations) also carry 0.0% OOS rates. This suggests the violation is treated as a compliance issue rather than an immediate safety hazard.

First, review the citation details carefully. Next, inspect your documentation and records—our data shows 390.9-SLL frequently co-occurs with medical certificate issues (391.41APC, 21 shared inspections) and HOS record failures (395.8A1-HOSP, 21 shared inspections). Verify your medical card is current and on file with your state DMV, and ensure your logbooks or ELD records are complete and accurate. Contact your carrier's compliance team or a safety officer to understand the specific finding and file any corrections promptly.

Citation frequency is elevated. Our inspection records show 1,093 citations in the last 12 months, compared to 1,342 all-time. The last 90 days recorded 250 citations, indicating sustained enforcement. Monthly trend data shows a spike in 2025-09 (149 citations, 2 OOS) followed by stabilization around 80–115 citations per month through early 2026. This signals ongoing compliance focus rather than a declining issue.

Yes, you may be able to contest it through the DataQs process, which allows drivers and carriers to challenge violations on the Motor Carrier Management Information System. Contestability depends on whether the violation is documentary (e.g., missing or improperly completed paperwork) or a finding of fact observed by the inspector. Documentary issues are often more defensible. File your challenge within 60 days of citation. Contact your carrier or a compliance professional for guidance on the specific grounds applicable to your case.

In the last 180 days, Kentucky leads enforcement with 216 citations, followed by California with 120 citations and Pennsylvania with 35 citations. These three states account for the majority of 390.9-SLL citations. If you operate in Kentucky or California, be especially attentive to compliance; our data shows 0.0% OOS rates in both states, but enforcement frequency is high. The remaining top states (Massachusetts, Minnesota, Arizona, Georgia, Oregon, West Virginia, Arkansas) each recorded under 30 citations.

Over the last 90 days, 390.9-SLL most frequently co-occurs with operating while ill or fatigued (392.2 variants, totaling 109 shared inspections across multiple sub-codes), followed by missing proof of periodic inspection (396.17C-PI, 24 shared inspections) and medical certificate violations (391.41APC, 21 shared inspections). This pattern suggests inspectors often find 390.9-SLL during checks triggered by driver fatigue or medical fitness concerns. Addressing these issues together improves compliance odds.

First Student Inc (40 citations) leads by a wide margin, reflecting the scale of school and charter bus operations. Other top carriers include transit authorities and regional transport companies. Across vehicle makes, Freightliners dominate the cited fleet (270 citations), followed by Ford (101), Freightliner (94), and Utility trailers (92). This distribution suggests 390.9-SLL citations span commercial truck fleets, transit operators, and mixed commercial services rather than concentrating in any single sector.