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CSA BASIC scores, explained for insurance agents

What the seven CSA BASICs measure, how percentiles differ from raw scores, which ones underwriters weight most, and how to read a carrier's safety profile.

CSA BASICs are seven categories the federal Safety Measurement System sorts a motor carrier's roadside violations into. Each category produces a percentile (how this carrier compares to similar carriers), not an absolute score. A carrier at the 85th percentile in a category has a worse record there than 85% of its peer group.

For an insurance agent the useful part is not the number. It is knowing which categories predict losses and which ones mostly predict paperwork.

#The seven BASICs

BASICWhat it counts
Unsafe DrivingSpeeding, reckless driving, improper lane change, seat belt
Crash IndicatorReported crashes, weighted by severity and recency
Hours-of-Service ComplianceLog violations, driving beyond limits
Vehicle MaintenanceBrakes, lights, tyres, defects found at inspection
Controlled Substances / AlcoholImpairment violations
Hazardous Materials ComplianceHM placarding, packaging, paperwork
Driver FitnessLicensing, medical certification, qualification files

#Percentile, not score

This trips people up constantly.

A percentile is relative to a peer group: carriers with a similar number of inspections or crashes. Two consequences:

  1. A small carrier and a large carrier with identical violation counts can sit at very different percentiles, because they are measured against different peers.
  2. A percentile can move without the carrier changing anything, if the peer group changes around it.

A percentile also requires enough data to compute. A carrier with very few inspections may have no percentile in a category. That is not a clean record: it is an absence of evidence, and it should never be read as a good one.

#Which ones underwriters actually weight

Not equally. In broad terms:

Unsafe Driving and Crash Indicator correlate most directly with losses. Speeding and reckless driving are behaviours that produce claims. A bad Unsafe Driving percentile on a carrier that also has crashes is the clearest signal on the page.

Hours-of-Service matters because fatigue causes severity, and because chronic HOS violations usually indicate dispatch pressure: a management problem, not a driver problem.

Vehicle Maintenance is a good proxy for how a fleet is run. It is also the category most likely to be inflated by heavy inspection exposure: a carrier running lanes with aggressive enforcement gets inspected more, so it accumulates more defects.

Driver Fitness and HazMat are frequently paperwork. A Driver Fitness flag can be a missing medical card in a file rather than an unqualified driver. Worth asking about, rarely worth declining over on its own.

Controlled Substances is low-frequency and high-consequence. Any hit warrants a direct conversation.

#Intervention thresholds

Each BASIC has a percentile threshold above which the carrier is prioritised for federal intervention. Thresholds differ by BASIC and are lower for carriers hauling hazardous materials or passengers.

Crossing a threshold means increased regulatory attention. It is a meaningful signal, but it is not the same as an enforcement action having happened.

#Reading a profile in practice

Four questions, in order:

  1. How much data is behind this? Few inspections means few conclusions.
  2. Which categories are elevated? Behaviour categories matter more than paperwork ones.
  3. Which way is it moving? A carrier improving from a bad position is a different risk from one deteriorating from a good one. A single snapshot cannot tell you this: you need the history.
  4. Does the story hold together? Bad maintenance plus bad HOS plus growth in fleet size is a carrier outrunning its own management.

Question 3 is the one a static report cannot answer, and it is usually the most predictive.

#Where the data comes from

All of it is public. You can pull a carrier's safety profile from a USDOT number with the free DOT safety profile lookup: rating, BASIC percentiles and crash history, no account needed.

Watching it change over time across a book of business is a different exercise. Native Base Market Tracker keeps a per-carrier history and reports what moved (new crashes, new violations, insurer changes) on the carriers you tell it to watch. See Watch List.

Every lead in Market Tracker carries the BASICs alongside a loss-risk tier and an ISS estimate; the DOT leads page shows what arrives with each carrier.

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