392.2-SLML — State/Local Laws - Failure to maintain lane.
FMCSA violation code under Unsafe Driving. 1,559 events recorded in roadside inspections. Severity weight: 1.
Violation code 392.2-SLML is a Federal Motor Carrier Safety Regulations citation issued under 49 CFR 392.2. It tracks a specific compliance failure recorded against motor carriers and drivers during FMCSA roadside inspections. The code rolls up into the FMCSA Safety Measurement System (SMS) Unsafe Driving BASIC, which feeds the carrier's percentile ranking and prioritization for FMCSA interventions. It applies to interstate motor carriers, drivers, and the commercial motor vehicles they operate; intrastate operators are subject when their state has adopted Part 350 of the FMCSR by reference. It carries a severity weight of 1, 1,559 citations have been recorded against this code in the FMCSA inspection record.
- Code:
- 392.2-SLML
- Code System:
- FMCSR
- BASIC Category:
- Unsafe Driving
- OOS Eligible:
- No
- Severity Weight:
- 1
- Violation Group:
- Dangerous Driving
- Total Events:
- 1,559
- Carriers Cited:
- 1,427
Ranks #618 of 3,146 FMCSR codes by citation frequency • OOS rate of 0.0% is below the FMCSR-wide average of 33.4%.
What 392.2-SLML means
State/Local Laws - Failure to maintain lane.
This citation references a state or local law under 49 CFR 392.2. The exact ordinance depends on the inspection jurisdiction and the text written on the inspection report — TruckCodex mirrors the FMCSA code catalog, not the full text of every state statute.
CSA/SMS severity weight 1 on FMCSA's 1–10 scale in the Unsafe Driving BASIC.
Not Out-of-Service eligible by itself; the citation still feeds the carrier's BASIC percentile when scored.
1,559 citations recorded in the FMCSA inspection mirror across 1,427 carriers.
Ranks #618 of 3,146 FMCSR codes by citation frequency.
How to use this code
CSA weight, OOS trigger, inspector focus, fix path, and DataQs — from published FMCSA fields and citation counts on this page
CSA / SMS weight
Severity weight 1 (1–10). Higher weights correlate more strongly with crash risk in FMCSA's published table. Rolls into the Unsafe Driving BASIC. SMS applies time weights (3× / 2× / 1×) over a 24-month window before ranking carriers by percentile.
OOS trigger
This code is not OOS-eligible by itself. It still appears on the inspection report and can move the carrier's BASIC percentile.
What inspectors typically check
FMCSR violations related to speeding, reckless driving, lane changes, seatbelt use, and other moving violations observed during roadside inspections.
- Observed speeding, reckless driving, improper lane changes, or seatbelt use
- Driver distraction (including handheld device use) when visible from roadside
- Moving-violation behavior during the stop or approach
Fix and prevent
- Correct the underlying condition and document the fix (date, work performed, who signed off).
- Coach observed driving behavior; Unsafe Driving scores move quickly because recent citations carry 3× time weight.
- Keep the correction in the compliance file — undocumented fixes look the same as non-compliance in a review.
DataQs challenge grounds
Carriers and drivers can file a Request for Data Review within 24 months when the record itself looks wrong. Common accepted grounds:
- Wrong violation code for the condition the inspector described
- Citation attributed to the wrong USDOT, driver, or unit
- Condition was already corrected / not present when the report was finalized
- Supporting evidence (photos, receipts, calibration, ELD extract) contradicts the citation
For brokers and shippers
Severity 1/10 — weigh frequency and recency on the carrier's inspection history, not a single old citation. Most-cited carrier in our table: J B HUNT TRANSPORT INC (9 citations). 1,427 carriers have at least one 392.2-SLML citation in the mirror — open a carrier's inspection list to see whether this code is a pattern or a one-off.
Violation Description
State/Local Laws - Failure to maintain lane.
Regulatory Reference
Federal Motor Carrier Safety Regulations
This violation references 49 CFR 392.2 in the Federal Motor Carrier Safety Regulations.
Top Carriers Cited
Ranked by frequency • 1,427 carriers total • Page 1 of 58
| # | Carrier | USDOT | # Violations |
|---|---|---|---|
| #1 | J B HUNT TRANSPORT INC | 80806 | 9 |
| #2 | WERNER ENTERPRISES INC | 53467 | 9 |
| #3 | WESTERN EXPRESS INC | 511412 | 7 |
| #4 | FEDERAL EXPRESS CORPORATION | 86876 | 6 |
| #5 | UNITED PARCEL SERVICE INC | 21800 | 6 |
| #6 | SWIFT TRANSPORTATION COMPANY OF ARIZONA LLC | 54283 | 6 |
| #7 | NEW PRIME INC | 3706 | 5 |
| #8 | US XPRESS INC | 303024 | 5 |
| #9 | EVANS DELIVERY COMPANY INC | 38111 | 5 |
| #10 | CENTRAL TRANSPORT LLC | 661173 | 5 |
| #11 | CEVA FREIGHT LLC | 1719074 | 4 |
| #12 | AVERITT EXPRESS INC | 36684 | 4 |
| #13 | XPO LOGISTICS FREIGHT INC | 241829 | 3 |
| #14 | PRIM USA INC | 3197149 | 3 |
| #15 | CRETE CARRIER CORPORATION | 73705 | 3 |
| #16 | P&S TRANSPORTATION LLC | 1243338 | 3 |
| #17 | JKC TRUCKING INC | 284600 | 3 |
| #18 | CR ENGLAND INC | 28406 | 2 |
| #19 | S Y S LOGISTICS INC | 2835363 | 2 |
| #20 | VALLEY EXPRESS INC | 189247 | 2 |
| #21 | RYDER TRANSPORTATION SOLUTIONS LLC | 299073 | 2 |
| #22 | HANDY TRANSPORTATION INC | 2406692 | 2 |
| #23 | BJJ ENTERPRISES LLC | 1521064 | 2 |
| #24 | TRANSPORT INDIANA LLC | 3057791 | 2 |
| #25 | TAKDIR TRANSPORTATION INC | 3230745 | 2 |
Recent Inspections
Latest inspections where 392.2-SLML was cited • 1,559 total events • Page 1 of 63
| Date | Report # | State | Level | OOS |
|---|---|---|---|---|
| 83788558 | MI | Level 3 | No | |
| 83775885 | NJ | Level 3 | No | |
| 83764658 | MA | Level 3 | No | |
| 83767315 | WY | Level 2 | No | |
| 83751319 | MI | Level 1 | No | |
| 83749401 | ME | Level 3 | No | |
| 83731768 | CA | Level 2 | No | |
| 83707166 | OK | Level 3 | No | |
| 83704794 | MD | Level 2 | No | |
| 83708046 | NV | Level 2 | No | |
| 83682737 | MI | Level 2 | No | |
| 83672693 | OK | Level 3 | No | |
| 83670629 | MA | Level 3 | No | |
| 83659967 | NV | Level 2 | No | |
| 83659695 | MI | Level 3 | No | |
| 83657297 | NJ | Level 3 | No | |
| 83656532 | MA | Level 3 | No | |
| 83618605 | CT | Level 3 | No | |
| 83614313 | MI | Level 3 | No | |
| 83601407 | KS | Level 2 | No | |
| 83590689 | OK | Level 3 | No | |
| 83591637 | WY | Level 2 | No | |
| 83591187 | MI | Level 3 | No | |
| 83577108 | MI | Level 3 | No | |
| 83560082 | CT | Level 3 | No |
How to comply with violation code 392.2-SLML
- Locate the regulation in the eCFR. Open https://www.ecfr.gov/current/title-49/section-392.2 on eCFR.gov to read the legal text the citation is written against. The eCFR is the National Archives' continuously updated electronic Code of Federal Regulations and is the canonical reference for any FMCSR section.
- Determine if your operation is subject. Confirm whether your operation is interstate (always subject to the FMCSR) or intrastate (subject when your state has adopted 49 CFR Part 350 by reference; most have). Intrastate operators in non-adopting states may be subject to a state analog instead of the federal rule.
- Identify the documented requirement. Read the requirement carefully: "State/Local Laws - Failure to maintain lane." Map it to the specific equipment, driver document, or operational practice it covers.
- Inspect or maintain to standard. Build a recurring inspection, training, or filing routine that catches this gap before a roadside inspector does. Pre-trip checks, scheduled preventive maintenance, driver-qualification file audits, and supervisor reviews are the standard places this kind of issue is caught early.
- Document compliance to demonstrate it on review. Keep a dated, signed record of each inspection, repair, training session, or filing tied to 392.2-SLML. During an FMCSA compliance review or a customer onboarding audit, the documentation is what proves the program runs — undocumented compliance is indistinguishable from non-compliance to the auditor.
Frequently asked questions about 392.2-SLML
What is FMCSA violation code 392.2-SLML? ▾
Is 392.2-SLML an out-of-service violation? ▾
What's the severity weight of 392.2-SLML? ▾
How many inspections have cited 392.2-SLML? ▾
Which BASIC category is 392.2-SLML in? ▾
What does a carrier do to fix 392.2-SLML? ▾
Where can I find related violation codes? ▾
Where can I find the full text of 392.2-SLML? ▾
About FMCSA violation codes
Every violation found during an FMCSA roadside inspection is recorded under a code drawn from the Federal Motor Carrier Safety Regulations — the codified safety rules motor carriers, drivers, and commercial motor vehicles must comply with in interstate commerce. Codes roll up into one of seven Behavior Analysis and Safety Improvement Categories (BASICs): Unsafe Driving, Hours-of-Service, Driver Fitness, Controlled Substances/Alcohol, Vehicle Maintenance, Hazardous Materials Compliance, and Crash Indicator. Each code carries a published severity weight (1–10) and an Out-of-Service eligibility flag.
Citations counted in the FMCSA Safety Measurement System (SMS) feed a 24-month rolling percentile rank for every motor carrier. Recent citations weigh more heavily than older ones — FMCSA applies a 3× multiplier to events 0–6 months old, 2× for 6–12 months, and 1× for 12–24 months. Carriers above the published intervention threshold for a given BASIC are prioritized for warning letters, focused investigations, and full compliance reviews.
TruckCodex mirrors the FMCSA Motor Carrier Management Information System (MCMIS) and the published violation dictionary on a daily refresh cycle. We do not author or modify violation records — every count, severity weight, and OOS flag on this page reflects what the FMCSA has on file. For real-time confirmation immediately before an enforcement decision, click through to the FMCSA Violations Search link above. Carriers who believe a citation was recorded in error can file a Request for Data Review through the FMCSA DataQs system.