Who this is for: carrier, owner-operator
What Is CSA Scoring?
CSA (Compliance, Safety, Accountability) is FMCSA's carrier safety measurement system. It converts roadside inspection violations and crash data into percentile scores across seven behavioral categories called BASICs, which FMCSA uses to identify carriers that need intervention.
What CSA Is
CSA stands for Compliance, Safety, Accountability — FMCSA's enforcement prioritization program launched in 2010. It replaced the older SafeStat system with a more granular, near-real-time scoring approach that scores carriers on seven categories of safety behavior instead of a single composite score.
How CSA Scores Are Calculated
CSA scores are calculated through the Safety Measurement System (SMS), FMCSA's underlying database. The SMS pulls data from: - Roadside inspection reports (submitted by state enforcement agencies) - DOT-recordable crash reports - Investigation results Violations are assigned severity weights (1–10 scale) and time weights (more recent violations count more). The resulting points are totaled for each carrier and compared against similar-sized carriers (peer group) to produce a percentile score (0–100).
What the Score Means
A higher CSA percentile score means the carrier performs worse relative to its peer group — not better. A carrier at the 95th percentile in a BASIC has more safety concerns than 95% of peer carriers. FMCSA sets threshold percentiles (which vary by BASIC) above which a carrier enters "alert" status and becomes a candidate for investigation or intervention. Thresholds are lower for passenger and hazmat carriers.
Who Can See Your CSA Scores
Some SMS data is publicly available through FMCSA's SMS website (ai.fmcsa.dot.gov/sms). However, not all BASIC scores are publicly visible — only BASICs where the carrier has enough data points to produce a statistically reliable score. Law enforcement, shippers, and brokers often review publicly available SMS data when vetting carriers.
How the peer group comparison works
CSA scores don't compare you to every carrier in the country — they compare you to carriers of similar size and operating profile. The peer group is generally determined by the number of inspections a carrier has had over the relevant data window. This is why a carrier with 5 inspections and 1 violation looks very different statistically than a carrier with 100 inspections and 20 violations, even if the violation rate is the same. Small fleets with few inspections can see their scores swing significantly from a single bad inspection, while large fleets have scores that are statistically more stable.
What alert status means for a carrier
When a carrier's BASIC percentile exceeds the FMCSA intervention threshold for that BASIC, it enters "alert" status for that category. Alert status itself does not automatically trigger a compliance review or penalty — it flags the carrier for potential intervention. Carriers in alert status may be prioritized for inspections by state enforcement, and may face more scrutiny from brokers and shippers who check SMS regularly. FMCSA uses alert status to build its caseload of carriers to contact or investigate.
Why a single inspection can swing a small fleet's score dramatically
CSA percentile scores compare carriers to a peer group of similar size. Small carriers with few total inspections have a statistically thin base. A single inspection with three violations can push a five-inspection carrier's score from the 40th percentile to the 85th percentile in one month. A large carrier with 200 inspections barely moves from the same three violations. This is not a flaw in the system — it's a reflection of the limited data available on small carriers. The practical implication: for small fleets, every inspection matters more than for a large operation. Perfect inspections aren't just good practice; they're the primary tool for managing score volatility.
Frequently Asked Questions
Does CSA score affect my safety rating?
Not directly. CSA scores inform FMCSA's decision to conduct a compliance review, and the outcome of that review determines the official safety rating (Satisfactory, Conditional, or Unsatisfactory). High CSA scores increase the likelihood of a compliance review being triggered.
How often are CSA scores updated?
SMS scores update monthly as new inspection and crash data submitted by state agencies is processed. A roadside inspection from last week typically doesn't appear in your scores until the next monthly update after the state submits the data.
Do CSA scores follow the carrier or the driver?
CSA BASIC scores follow the carrier — they are carrier-level metrics based on inspections conducted on vehicles operating under that carrier's USDOT number. Individual driver violations appear in that carrier's BASIC scores. Drivers have their own PSP records that show their personal inspection history, but "CSA scores" as typically discussed are a carrier measurement, not a driver rating.
If my carrier has insufficient data, is that better or worse than having scores?
"Insufficient data" means FMCSA doesn't have enough inspections to generate a statistically reliable percentile — it's not a positive or negative status. Some shippers and brokers treat it as a yellow flag and require additional vetting. As the carrier accumulates more inspection history, scores become visible. A carrier with mostly clean inspections typically sees favorable scores emerge as the data builds.