CSA Scores Explained: What They Are and How to Keep Yours Clean

Most carriers know their CSA score matters. Fewer understand exactly how it's calculated, which violations hurt most, or how to actually bring a score down once it climbs. This guide covers the mechanics of the FMCSA scoring system and the specific actions that move the needle in both directions.

What is a CSA score?

CSA stands for Compliance, Safety, Accountability — FMCSA's program for tracking carrier safety performance and prioritizing enforcement resources. Launched in 2010, the system replaced the older SafeStat scoring method.

• Scores are calculated per BASIC (Behavior Analysis and Safety Improvement Category), not as a single composite number. You can be clean in six categories and flagged in one.
• Data comes from three sources: roadside inspection reports, crash reports filed with FMCSA, and compliance review findings.
• Your scores are used by FMCSA to prioritize enforcement interventions. They are also publicly visible — brokers, shippers, and insurance companies use them to evaluate carriers.

The 7 BASICs — what each covers

1. Unsafe Driving: Speeding, reckless driving, improper lane change, inattention, following too closely. Violations come from both roadside citations and officer observations.
2. Hours of Service Compliance: HOS violations, ELD tampering, false records of duty status, operating beyond legal driving or on-duty limits.
3. Driver Fitness: Invalid CDL, wrong CDL class for the vehicle, expired medical certificate, disqualified driver operating a CMV.
4. Controlled Substances/Alcohol: Positive drug or alcohol tests, refusals to test, evidence of substance use during operation.
5. Vehicle Maintenance: Brake defects, tire violations, light violations, load securement failures, and other mechanical defects discovered during inspections.
6. Hazardous Materials Compliance: Placarding violations, packaging failures, documentation issues for hazmat shipments.
7. Crash Indicator: Reportable crashes involving fatality, injury, or a vehicle towed from the scene. Weighted by severity.

How violations are weighted and scored

The CSA scoring formula has two key components: severity weight and time weight.

• Severity weight: Each violation type carries a severity score from 1 (minor administrative issue) to 10 (critical safety violation). A texting-while-driving violation scores 10. A missing cab card might score 1.
• Time weight: Violations in the most recent 6 months are multiplied by 3. Violations from months 7–12 are multiplied by 2. Violations from months 13–24 are multiplied by 1. Violations older than 24 months fall off entirely.
• Percentile ranking: Your raw score is then compared against carriers with similar inspection exposure. The result is a percentile — how you rank relative to your peer group. A score above 65% in most BASICs triggers FMCSA attention.

This means recent violations hurt dramatically more than older ones. One serious violation in the last 6 months can push your score above the alert threshold even if you have been clean for the 18 months before it.

Which violations hurt your score the most

High-severity violations (weight 8–10) — these can move your score by themselves:

• Operating a CMV while ill or fatigued — severity 10
• Texting while driving — severity 10
• Speeding 15+ mph over the posted limit — severity 10
• Brake systems critical defect — severity 8
• False record of duty status (log falsification) — severity 8
• Operating with a suspended CDL — severity 8
• Expired medical certificate — severity 7

Medium-severity violations (weight 5–7):

• Most equipment violations (tire defects, light violations, brake adjustment issues outside OOS threshold)
• Routine HOS violations (missing 30-minute break, minor log errors)
• Speeding 11–14 mph over limit — severity 6

Low-severity violations (weight 1–4):

• Administrative paperwork issues (no cab card, no FMCSA regulations booklet)
• Minor equipment defects that do not affect safe operation

How to check your own CSA score

1. Go to ai.fmcsa.dot.gov (the SMS — Safety Measurement System portal) and enter your USDOT number.
2. Review each BASIC category. Categories with insufficient data to score show as "No Data" — these do not trigger interventions but also do not demonstrate a clean record.
3. Drill into individual violations to see the specific inspection, officer, location, and severity score for each item.
4. Request your full DataQ inspection history to see all inspections, including clean ones — clean inspections help your percentile even if they don't add points.

How to improve your CSA score

• Challenge incorrect violations via DataQ: If an officer recorded a violation incorrectly — wrong vehicle, wrong severity code, violation you believe was improper — file a DataQ request at fmcsa.dot.gov/dataq. Successful challenges remove the violation entirely. Even partial challenges (severity reduction) help.
• Time is your biggest ally: The most recent 6 months are weighted 3x. Running clean for 6 months after a bad period cuts the impact of old violations by two-thirds. Running clean for 24 months eliminates old violations completely.
• Prioritize high-severity violations first: One severity-10 violation hurts more than five severity-2 violations combined. Focus your training and maintenance attention on the highest-severity items first.
• Target your highest BASIC: Identify which category is driving your score up and address the specific violations in it. Carrier with Vehicle Maintenance issues should increase PM frequency. Carriers with HOS violations need ELD training.
• Increase inspection exposure — strategically: Clean inspections help your percentile. Some carriers voluntarily submit to inspections when they know their equipment and records are perfect, improving their rank within the peer group.

Why your CSA score affects your business beyond compliance

FMCSA enforcement is only one consequence of a high CSA score. The commercial consequences are often more immediate:

• Many large shippers and 3PLs (third-party logistics providers) automatically disqualify carriers with any alert-status BASIC. Some use 50% as their cutoff; others use 35%. You may lose access to entire categories of freight without knowing why.
• Brokers frequently filter out carriers with Vehicle Maintenance or Unsafe Driving alerts. If your score is above threshold, you may be invisible on their carrier lists entirely.
• Insurance premiums correlate with CSA scores. Carriers with Vehicle Maintenance or Unsafe Driving alerts pay measurably higher premiums at renewal time.
• A pattern of alerts triggers a Compliance Review — a full FMCSA audit. If the review identifies systemic problems, the result can be a conditional or unsatisfactory safety rating, which triggers additional intervention and makes it nearly impossible to get loads from compliant brokers.

TRUCC only dispatches carriers with clean safety records. See how we verify carrier compliance before every load.