Where the line is strictest.
The out-of-service rate measures how often an inspection ends with a vehicle or driver pulled off the road — per 1,000 inspections. The map runs cool where enforcement clears most rigs and hot where it doesn't.
The map gets granular.
Zoom from states down to individual counties. Inspection corridors and weigh-station counties light up; rural counties with only a handful of inspections are held back so a single bad stop can't paint a whole county red.
Counties with fewer than 25 inspections this month (1,385 of 2,629) are shown in a neutral fill — their per-1,000 rates swing wildly on tiny samples and aren’t comparable.
What inspectors write up.
The top violation codes by citation count, with the share that converted to an out-of-service order. A high conversion means the violation almost always parks the truck — tire and brake defects sit at the top.
Violation detail runs about four weeks behind inspection volume — these citations cover May 2026. OOS conversion above ~90% (shown in red) means the citation almost always ends the trip.
One category dominates.
Every roadside violation rolls up into one of six CSA BASIC categories. Across the whole month, vehicle-maintenance defects swamp everything else — the truck, not the driver, is where most stops go wrong.
What’s trending up.
The violation codes moving fastest week over week. A spike can signal a regional blitz, a seasonal defect pattern, or simply where enforcement is leaning right now.
The map is the country. What about your DOT number?
National trends are the backdrop. Your inspection history, your BASIC scores, and your renewal calendar are what actually move your insurance and your broker access. Trucking Comply tracks all of it in one place.
Source & disclaimer
Aggregated from public FMCSA MCMIS roadside-inspection data. Trucking Comply is not affiliated with or endorsed by FMCSA. Severity weights are a TC proxy of the SMS methodology, not official CSA scores.