Your CSA scores shape how FMCSA and your customers see you. They can trigger warning letters, investigations and tougher roadside scrutiny. Yet many carriers never look at their data until something goes wrong.
What CSA and SMS Are
CSA stands for Compliance, Safety, Accountability. It is FMCSA’s program for identifying carriers with safety problems and intervening before crashes happen.
The Safety Measurement System (SMS) is the tool FMCSA uses to rank carriers. It takes data from roadside inspections, crash reports and investigation results, then groups that data into categories called BASICs.
Your scores are percentiles. A percentile compares your carrier to other carriers with similar levels of exposure, such as number of inspections or crashes. Higher percentiles mean worse performance compared to your peers.
The Seven BASICs
The SMS groups safety data into seven Behavior Analysis and Safety Improvement Categories:
- Unsafe Driving. Speeding, reckless driving, improper lane changes, texting and seat belt violations.
- Crash Indicator. History of reportable crashes.
- Hours of Service Compliance. Violations of Part 395, including logs, ELDs and driving over hours.
- Vehicle Maintenance. Brakes, lights, tires and other defects found at roadside.
- Controlled Substances/Alcohol. Possession or use of drugs or alcohol, and related violations.
- Hazardous Materials Compliance. Placarding, shipping papers, and securement for hazmat loads.
- Driver Fitness. Invalid licenses, medical certificate problems and other qualification issues.
Some BASIC data is not shown to the public for property carriers. The details of what is public have changed over time and may change again. FMCSA has also been working on changes to the SMS methodology, which could alter how categories are organized and scored. Check the current SMS website for how your data is presented.
How Scores Are Calculated
A few factors drive your percentile in each BASIC:
- Severity weighting. Each violation is weighted based on how closely it relates to crash risk. Out-of-service violations generally carry extra weight.
- Time weighting. Recent violations count more than older ones. The SMS uses a rolling 24-month window.
- Exposure. Scores are normalized by factors like the number of inspections or power units and miles.
- Peer group comparison. Your measure is compared to other carriers in a similar safety event group.
Because it is a rolling window, your scores can change each month even if nothing new happens. Old violations age out, and other carriers’ data changes the comparison.
Clean inspections help too. In several BASICs, inspections with no violations increase your denominator and can improve your measure.
Intervention Thresholds
When a carrier’s percentile in a BASIC reaches or exceeds a set threshold, FMCSA may intervene. The threshold varies by BASIC and is lower for passenger carriers and hazmat carriers. Unsafe Driving, Crash Indicator and HOS Compliance generally have lower thresholds than the other BASICs because of their stronger link to crashes.
FMCSA interventions can include:
- A warning letter
- Targeted roadside inspections
- An offsite or onsite investigation
- A cooperative safety plan, or a notice of violation or claim
Being over a threshold does not change your safety rating by itself. It raises the chance of an investigation, which can. Customers and brokers may also look at your data when deciding whether to use you.
How to Improve Your Scores
You cannot delete accurate violations. You can reduce new ones and fix inaccurate data.
- Review your data monthly. Log into the FMCSA portal and look at each inspection and violation.
- Challenge errors through DataQs. If an inspection is assigned to the wrong carrier, lists a violation that did not happen, or has other errors, file a Request for Data Review. Include supporting documents.
- Find patterns. If most points come from one BASIC, focus there. Repeated light violations point to pre-trip inspection problems. Repeated HOS violations point to dispatch or training issues.
- Coach drivers. Share inspection results with drivers. Address unsafe driving behavior directly.
- Fix the paperwork. Driver Fitness violations are often preventable, such as expired medical certificates.
- Certify roadside reports. When an inspection report lists violations, make repairs, certify them and return the report as required by 49 CFR 396.9.
DOT Compliance Watch supports this work by tracking medical card and CDL expirations, keeping DVIRs and maintenance records organized, and alerting you before key documents lapse. Expired documents are an easy way to pick up Driver Fitness violations, and one of the easiest to prevent. For questions about a specific violation or challenge, check with FMCSA or a qualified advisor. More background is in our FAQ.
Take control of your numbers
CSA scores reflect habits, not luck. DOT Compliance Watch helps you build habits that keep documents current and records organized. Compare plans and find the one that fits your operation.