Only 7% of motor carriers pass a DOT audit without a single violation. For everyone else, one violation is rarely the whole story; it’s a brake defect that stacks onto a missed log, which stacks onto an expired medical card, until an out-of-service order takes a truck off the road for good. Each one chips away at your CSA score, and a bad CSA score follows you into every insurance renewal and every audit trigger from here on. The fix isn’t more paperwork. It’s knowing exactly where inspectors look first. Below are the 11 violations cited most often on U.S. highways, and how TruckX’s ELD and fleet management tools close the gaps that cause them.
1. Hours-of-Service (HOS) Violations
Exceeding drive-time limits or falsifying logs remains one of the most cited driver violations. Fatigue-related HOS breaches carry an automatic out-of-service order until the driver reaches compliant status.
How to Avoid: Use an FMCSA-registered ELD that tracks drive time automatically and warns drivers before they approach a limit. TruckX’s ELD gives real-time HOS visibility to both drivers and dispatchers, so violations get caught before an inspector does.
2. ELD Malfunctions and Unregistered Devices
Several ELD models were revoked from FMCSA’s registered device list in 2025. Fleets still running them face “operating without an ELD” citations, even if the device is technically functioning.
How to Avoid: Confirm your ELD provider stays on FMCSA’s current list and pushes compliance updates automatically. TruckX maintains FMCSA registration and handles firmware updates so drivers never fall out of compliance mid-route.
Why This Matters for Small Fleets
Owner-operators often run older hardware longer than large fleets do, since replacement is costly. That habit puts single-truck operations at risk during Brake Safety Week and unannounced inspection blitzes.
3. Vehicle Maintenance Violations (Part 396)
Maintenance failures, especially brake defects, are the leading cause of out-of-service orders. Brake system defects were the top vehicle out-of-service violation in 2025, accounting for roughly a quarter of all vehicle OOS violations, and combined with related brake issues, they caused over 40% of vehicle out-of-service orders.
How to Avoid: Run structured pre-trip and post-trip inspections every time, not just before scheduled maintenance. TruckX’s fleet management platform logs defects digitally and routes them straight to a repair workflow.
4. Parts and Accessories Violations (Part 393)
Cracked lights, worn tires, and missing reflectors are easy for inspectors to spot visually, which makes them among the most frequently cited defects on the road.
How to Avoid: Build a standardized inspection checklist covering lighting, tires, and mirrors, and require photo documentation for every defect found and fixed.
5. Driver Qualification File Violations (Part 391)
Missing or incomplete driver files are a common paperwork failure. Nearly 12% of all FMCSA violations trace back to gaps in driver qualification documentation.
How to Avoid: Store DQ files digitally with expiration alerts for medical certificates, road test results, and employment verification. A cloud-based system beats a filing cabinet every time an auditor asks for records within 48 hours.
6. CDL and Endorsement Violations (Part 383)
Operating without the correct CDL class or a required endorsement, such as Tanker or Hazmat, is a safety-critical violation that frequently results in an immediate out-of-service order.
How to Avoid: Cross-check every driver’s license class and endorsements against the cargo they’re assigned before dispatch, not after.
7. Drug and Alcohol Clearinghouse Violations
Since the Clearinghouse became mandatory, enforcement has tightened considerably. Carriers that skip pre-employment queries or miss annual limited queries are among the most heavily fined violators.
How to Avoid: Register as an employer, run every required query on schedule, and never let a driver perform safety-sensitive work before results come back.
8. Unsafe Driving Violations (Part 392)
Speeding, following too closely, and improper lane changes fall under the Unsafe Driving BASIC, one of the highest-weighted categories in CSA scoring.
How to Avoid: Monitor driving behavior continuously rather than relying on annual MVR checks. TruckX’s fleet management dashboard flags harsh braking, speeding events, and other risk patterns so coaching happens before a citation does.
9. Cargo Securement Violations
Improperly secured loads were cited over 18,000 times in 2025 alone, making them one of the most common vehicle-focused violations during CVSA enforcement events.
How to Avoid: Train drivers on load-specific securement rules and require a securement check as part of every pre-trip inspection.
10. Recordkeeping and False Log Violations
Inspectors now cross-reference ELD data against fuel receipts, toll records, and dispatch logs to catch inconsistencies. A gap between reported miles and supporting documents raises red flags fast.
How to Avoid: Keep six months of ELD and supporting records retained and organized. TruckX centralizes HOS data, IFTA reporting, and supporting documentation in one system, so nothing gets lost between a driver’s cab and the back office.
11. IRP and IFTA Registration Errors
Misreported mileage or an incorrect base-jurisdiction registration under the International Registration Plan creates a compliance exposure unrelated to the truck itself.
How to Avoid: Automate mileage tracking by jurisdiction instead of reconstructing trip logs manually at filing time.
Build Compliance Into Every Mile
Most of these violations share a root cause: manual processes that break down under daily pressure. TruckX’s ELD and fleet management platform automates HOS tracking, digital DVIRs, maintenance alerts, IFTA reporting, etc all in one system, giving owner-operators and small fleets the same compliance infrastructure larger carriers rely on. Fewer gaps mean fewer violations, a stronger CSA score, and less time spent worrying about the next inspection. Explore our Fleet Management and ELD Solutions at TruckX.com or call +1 (650) 600-6007 today to discover more.
