FMCSA Safety Ratings and CSA BASICs, Explained for Drivers

Recruiters love to say "we're a Satisfactory-rated carrier" or "our CSA scores are great." This guide explains what those words mean, where the numbers come from, and how to use them when you're picking a company — without turning into a compliance manager.

Two different things: safety ratings and CSA

People mix these up constantly.

• A safety rating is a formal grade FMCSA gives a carrier after an investigation (often called a compliance review). It's defined in 49 CFR Part 385.
• CSA (Compliance, Safety, Accountability) is FMCSA's enforcement program. Its Safety Measurement System (SMS) crunches roadside inspections, crash reports and investigation results into scores, so FMCSA can decide which carriers to investigate first.

Think of SMS as the radar and the safety rating as what happens when an officer actually pulls you over.

The safety ratings

There are three ratings, plus "unrated":

After a proposed Unsatisfactory rating, a property carrier is prohibited from operating starting on the 61st day unless it improves (hazmat and passenger carriers get less time). That's why an Unsatisfactory carrier is a bad bet even if it's still hauling today.

How CSA scores carriers: the seven BASICs

SMS sorts safety data into seven BASICs (Behavior Analysis and Safety Improvement Categories):

1. Unsafe Driving — speeding, reckless driving, improper lane changes, texting or handheld phone use, seat belt violations.
2. Crash Indicator — history of state-reported crashes. (Not public.)
3. Hours-of-Service (HOS) Compliance — driving over hours, missing or false logs, ELD violations.
4. Vehicle Maintenance — brakes, lights, tires, defects, and load securement problems.
5. Controlled Substances/Alcohol — drug or alcohol use or possession.
6. Hazardous Materials Compliance — placards, shipping papers, leaking containers. (Not public.)
7. Driver Fitness — no valid CDL, no medical certificate, not qualified to drive.

How a score is built

For each BASIC, SMS takes violations from roadside inspections over the last 24 months and weights them:

• Severity — each violation has a weight from 1 to 10 based on its link to crash risk, with extra weight added if it caused an out-of-service order.
• Time — recent violations count more. Violations in the last 6 months count three times as much as ones 12–24 months old.
• Exposure — results are normalized by inspections or by fleet size and miles, so a 2,000-truck fleet isn't compared to a 5-truck fleet on raw counts.

Then SMS groups the carrier with others that have a similar amount of data and turns its measure into a percentile from 0 to 100. Higher is worse. A 75th percentile in HOS means the carrier's HOS measure is worse than 75% of similar carriers.

Thresholds and alerts

When a percentile crosses an intervention threshold, the carrier gets an alert in that BASIC and becomes a priority for FMCSA. For most property carriers, the threshold is 65% for Unsafe Driving, Crash Indicator and HOS, and 80% for the other BASICs. Thresholds are lower for passenger and hazmat carriers. An alert doesn't mean the carrier is unsafe or shut down — it means FMCSA may send a warning letter, do an investigation, or take other action.

The full method is in FMCSA's SMS Methodology document.

What you can (and can't) see as a driver

Since the FAST Act of 2015, most BASIC percentiles and alerts for property carriers are hidden from the public. So when a recruiter says "our CSA scores are great," you usually can't verify the percentile itself. You can still see:

• Every roadside inspection and the violations cited, on the SMS website.
• Out-of-service rates for drivers and vehicles versus the national average, on SAFER and on SemiLife carrier pages.
• Crash counts over 24 months.
• The safety rating and its date.

Honestly, those are more useful for picking a job anyway. Violation details tell you what actually goes wrong. Lots of brake and light violations? The shop is behind. Lots of HOS and false-log violations? Dispatch is probably pushing drivers.

How this affects you personally

CSA scores belong to the carrier, but the data comes from you and every other driver on the fleet.

• Your inspections count. Every roadside inspection with your name on it goes on your PSP record. FMCSA's Pre-Employment Screening Program keeps 5 years of crash data and 3 years of inspection data. Future employers can see it with your permission, and you can order your own copy.
• Clean inspections help too. Inspections with no violations improve a carrier's measure by adding exposure without adding points. A good pre-trip is the cheapest safety bonus there is.
• You can dispute errors. If an inspection report is wrong — wrong driver, wrong unit, a violation that was dismissed in court — you or your carrier can file a request in DataQs.
• Your CDL record is separate. Moving violations and convictions go on your state driving record (MVR). Drug and alcohol violations go into the Drug & Alcohol Clearinghouse, which carriers must check before hiring you.

Changes coming to CSA

FMCSA approved a revised SMS method in November 2024. It reorganizes the BASICs into "compliance categories," splits vehicle maintenance into more specific groups, and simplifies severity weights. As of October 2026 it is not in effect: SMS still runs on the seven BASICs, and FMCSA has said it will announce the start date separately. Carriers can see their results under the new method on the CSA Prioritization Preview site. For drivers, the basics stay the same: clean inspections good, violations bad, recent ones count most.

How to use all this when choosing a carrier

1. Check the safety rating and its date. Unsatisfactory is a no. Conditional needs a straight answer.
2. Compare driver and vehicle OOS rates with the national average, and look at how many inspections they're based on.
3. Skim the violation list for patterns: brakes and tires point at maintenance, HOS and logs point at dispatch pressure.
4. Ask the recruiter directly: "What were your last three months of inspections like, and what are you working on?" Good safety departments love that question.
5. Pair the numbers with what drivers say. Use our full carrier background check guide.

None of these numbers predict your exact experience at a company. But a carrier that keeps its trucks fixed and its drivers legal is usually also a carrier that pays on time and tells the truth.