FMCSA MCMIS · commercial vehicles only
Where trucks and buses crash: reportable crashes involving commercial motor vehicles, by county. Select a county for its figures.
Source: FMCSA Motor Carrier Management Information System crash file. Counts are crashes meeting federal or state reporting thresholds and involving at least one commercial motor vehicle — not all traffic crashes.
Every marker on this map comes from the Federal Motor Carrier Safety Administration's Motor Carrier Management Information System, or MCMIS — the national database states report commercial vehicle crashes into. It covers crashes involving commercial motor vehicles only. A car-on-car collision will not appear here, however serious it was.
Not every collision involving a truck or bus reaches this dataset. Under 49 CFR 390.5, a crash is DOT-reportable only when a commercial motor vehicle is involved on a public road and at least one of the following is true:
Minor property-damage collisions are excluded. That is why county counts here run lower than a general traffic-accident total for the same area, and why the map is a better proxy for crash severity than for crash frequency.
A reportable crash stays on a carrier's Safety Measurement System record for 24 months, and it is weighted more heavily the more recent it is. It feeds the Crash Indicator BASIC, which insurers and shippers read alongside your other safety data. FMCSA's Crash Preventability Determination Program lets carriers request review of certain crash types, and a determination of not-preventable removes the crash from the SMS calculation — but only if someone files the request.
The county view is useful for two practical things: seeing where your own lanes carry the most exposure, and sanity-checking a driver's history against the corridors they actually run. Pair it with a current record. Our Missouri driving record page explains what the state file contains, and license monitoring covers what changes between annual pulls.
Use Measure to switch between all crashes, injury crashes and fatal crashes. View toggles between county and state aggregation. The Year slider filters by crash year, and the United States / Missouri buttons reset the map extent. Selecting a county opens its figures.
Source: FMCSA MCMIS crash file. Figures reflect what states have reported and are subject to revision; late-reported crashes can change recent-year counts. Not an official FMCSA publication.
