That Clean OOS Rate? Check What Kind of Inspections Built It

A broker I work with was walking me through a carrier she wanted to use — 4 power units, 14 months of authority, MC-1247893 / DOT-3567102. Clean OOS rate. Zero violations in the prior 24 months. She'd already decided. I asked her to pull up the carrier's inspection history in SAFER and tell me what level those inspections were.

She looked. Eleven inspections. All Level 3.

"What's Level 3?" she asked.

Driver only. The inspector checked the driver's CDL, medical card, hours-of-service logs, and drug/alcohol indicators. They never touched the truck. Eleven inspections in 18 months, and not one inspector had looked at the brakes, tires, steering, lights, or coupling devices on any of this carrier's equipment.

She loaded them anyway. I'll leave the rest of that story there, but the conversation we had after was much longer than the one before.

The Six Levels and What They Actually Mean

FMCSA and state enforcement agencies conduct roadside inspections under a standardized program with defined inspection levels. Brokers generally know two words: "inspection" and "OOS." The level structure is what most people skip over, and it's where the signal lives.

Level 1 is the North American Standard Inspection — the full version. The inspector checks the driver and the vehicle. Brakes, tires, steering, coupling devices, cargo securement, lights, suspension — the vehicle gets opened up and examined. A Level 1 with zero violations means something real. It means a trained inspector got under that truck and found nothing wrong.

Level 2 is the walk-around driver/vehicle inspection. Similar to Level 1 but conducted without the inspector physically going under the vehicle. Still covers the vehicle exterior, lights, and observable components. Less comprehensive than Level 1, but it's a vehicle inspection.

Level 3 is driver only. No vehicle inspection. The inspector checks credentials, HOS compliance, seat belt, medical certification, and visible signs of impairment. The truck sits there untouched. Whatever condition the equipment is in, it stays unknown.

Level 5 is vehicle only — no driver present. Happens at inspection facilities when a truck arrives without its driver. Checks the vehicle side of the equation.

Levels 4 and 6 are specialty inspections — Level 4 for special studies, Level 6 for enhanced radioactive materials checks. These are rare in routine vetting contexts.

Every inspection that produces a recordable violation or OOS order gets reported into FMCSA's Motor Carrier Management Information System. That data flows into the SMS and surfaces in BASIC scores. A Level 3 inspection that finds nothing wrong records a clean inspection — but it only checked half the picture.

Here's the mechanical problem: the Vehicle Maintenance BASIC tracks vehicle-related violations. If a carrier's entire inspection record is Level 3, they've had zero vehicle inspections. Zero vehicle inspections means zero vehicle violations. Zero vehicle violations means the Vehicle Maintenance BASIC either shows blank (insufficient data) or an artificially clean number — not because the trucks are maintained, but because no one has looked at them.

Two Carriers, Same OOS Rate, Different Situations

Picture two carriers. Each has 15 inspections in the last 24 months. Neither has any OOS violations. Their OOS rates are identical. One is a carrier I'd be comfortable putting freight on. One is a carrier I'd want to ask a lot of questions before touching.

Carrier A — all 15 are Level 1 or Level 2. Inspectors have repeatedly put eyes on the vehicles, checked the brakes, gone under the frame. Fifteen times over two years, this carrier's trucks held up to physical scrutiny. That's an actual track record.

Carrier B — all 15 are Level 3. Fifteen inspectors confirmed the drivers were licensed and had their logbooks in order. The trucks are a complete unknown. The vehicles have never been independently examined since the carrier pulled authority.

Under 49 CFR § 396.17, motor carriers are required to have their commercial motor vehicles inspected at least once every 12 months. That's the carrier's obligation and it sits with their internal maintenance records — not with roadside enforcement. But roadside Level 1 inspections are the external validation that the carrier is holding up their end. A carrier whose fleet has never been through a Level 1 inspection may be perfectly compliant with § 396.17. Or they may be running trucks with brake defects that would produce an immediate OOS on sight. The BASIC can't tell you which, because no one has checked.

The $500,000 difference between a cargo claim that settles quietly and one that goes to trial often comes down to what the post-crash investigation finds in the truck's maintenance records and equipment condition. A broker who loaded a carrier with an unexamined fleet is in a different position than a broker who loaded a carrier with 15 clean Level 1 inspections. That position matters more now — post-Montgomery v. Caribe Transport II, LLC, decided unanimously May 14, 2026 — because state-court negligent selection cases are now the terrain. Reasonable care at the time of tender is the standard a jury applies.

Reading the Inspection History, Not Just the Score

When you pull a SAFER snapshot, the inspection history is listed individually — date, state, level, violations, OOS status. The level column is what you want. Here's what to look for:

Distribution of levels. A healthy inspection record mixes Level 1 and Level 2 checks with Level 3 stops. Level 3s aren't bad — enforcement naturally does driver checks at weigh stations and checkpoints. But a record that's exclusively Level 3 is a red flag worth noting.

Recency of the last Level 1. If a carrier's most recent Level 1 inspection was more than 12 months ago, there's a gap in external vehicle verification. For a carrier under 18 months of authority — the new entrant window — any gap in Level 1 coverage is significant. These carriers have the least operating history; their equipment condition is the least known.

Inspection frequency versus fleet size. A 5-truck carrier with 3 inspections in 24 months has a thin record. At a rough enforcement frequency of 2–4 inspections per 100,000 VMT, low counts suggest either limited miles, limited enforcement contact, or both. When a carrier operates in corridors where enforcement is light, their inspection record is less informative than one built on high-enforcement lanes through Ohio, Indiana, or Texas.

The Vehicle Maintenance BASIC in context. If the BASIC shows blank or very low percentile, and the entire inspection record is Level 3, that's not a clean maintenance record — it's an untested one. Blank doesn't mean good. I've covered that before. Blank because of all-Level-3 inspections is a specific flavor of blank that needs a note in your file.

What to Do When the Level Breakdown Looks Wrong

You find a carrier with 10 inspections, all Level 3, and you need to make a load decision. You have a few options.

First, ask. The T-call or carrier setup call is the right place. "Do your drivers go through regular vehicle inspections at terminals or inspection facilities?" A carrier running a legitimate operation knows their inspection history and can speak to it. "We run I-80 regularly, we go through the Portage weigh station all the time" tells you something. Blank silence or "I'm not sure" tells you something different.

Second, check whether they've passed the new entrant safety audit if they're under 18 months. That audit — required under 49 CFR § 385.308 — is conducted by FMCSA compliance staff and checks paperwork compliance, not equipment condition. Passing it doesn't fill the vehicle inspection gap. But whether the audit is listed as completed at least confirms they cleared the minimum regulatory threshold.

Third, decide whether the freight warrants the additional inquiry. Not every load requires the same risk tolerance. A pallet of printer paper on a local move is a different risk calculation than a $180,000 electronics load or a temperature-sensitive pharma shipment on a 1,400-mile run. The higher the cargo value and the longer the haul, the more that vehicle condition uncertainty matters.

How I Document This

When I'm vetting a carrier and the inspection level breakdown is part of the decision, my record looks something like this:

When the record raises questions:

The second note doesn't kill the carrier. It captures what you knew, what you asked, what they said, and your reasoning. That's the record that matters if something goes wrong 90 days from now and a plaintiff's attorney asks what you knew at dispatch.

The OOS rate is a summary. The inspection level breakdown is the data underneath it. Most vetting workflows stop at the summary. Spend 60 seconds reading the breakdown, and you'll know something about that carrier that the rate alone won't tell you.

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— Mason Lavallet

Founder, DOTScreener.com