Roadside Inspection Map

How to read this map

• Write-up rate is the share of inspections that found at least one violation. Out-of-service rate is the share that put the driver or the truck out of service. Both are per inspection, not per truck that drove past.
• A place that writes up more is often a place where inspectors look harder, not one where trucks are in worse shape. That's the point: it tells you what to expect when you're pulled in.
• Driver-only inspections (Level III) don't look at the truck, so places that do a lot of them show fewer brake, light and tire violations. Each station and county shows its mix of inspection levels.
• Counties with few inspections are pulled toward their state's rate so a handful of stops doesn't paint a county dark. Counties with fewer than 30 inspections are left blank.
• Diamonds are traffic enforcement spots: places where most inspections follow a traffic stop, usually for speeding. Nearly every inspection there finds a violation, the one the truck was pulled over for, so they aren't ranked with the weigh stations. Trucks that pass without being stopped aren't in the data.
• FMCSA records don't include coordinates for weigh stations. We place a station on its OpenStreetMap location when the names match; otherwise at the town it's named after, or the county's center. Those are marked approximate.
• Source: FMCSA inspection and violation records. Updated weekly. Map data © OpenStreetMap contributors.