Sources and authorities
Four federal sources, and one claim we deliberately did not make.
The series and its discontinuity
- Federal Motor Carrier Safety Administration, Large Truck and Bus Crash Facts, notes accompanying the trends tables. Source of the reclassification statement quoted in section two, including the figure of 329 light pickup trucks moved from the passenger vehicle count into the large truck count beginning with 2016 data, and of the instruction that comparisons of 2016 and later FARS large truck data with prior years should be performed with caution. FMCSA.
- Federal Motor Carrier Safety Administration, Trends in Commercial Motor Vehicle Safety, presented March 2022. Source of the year-by-year values in section three for large truck and bus fatal crashes from 2006 to 2020. The same slide carries the reclassification caution as a footnote to that series.
- Federal Motor Carrier Safety Administration, Trends Table 1, Large Truck and Bus Fatal Crash Statistics, series beginning 1975. Source of the four 1975 figures in section five: 4,032 fatal crashes, 4,304 vehicles involved, 4,816 total fatalities, and a fatalities rate of 0.363 per 100 million vehicle miles traveled by all motor vehicles.
- Federal Motor Carrier Safety Administration, Large Truck and Bus Crash Facts 2022, report number FMCSA-RRA-24-001, published September 2025. Source of the statement that the fatalities rate stayed at 0.192 from 2021 to 2022, which the agency describes as 6 percent below the 21st-century peak of 0.205 in 2000.
The claim we did not make, and why it matters more than the ones we did. The largest single-year rise in the published series falls exactly at the reclassification boundary, from 3,864 in 2015 to 4,396 in 2016. It would have been easy, and would have read well, to say that the change inflated the increase everybody quotes. We have not, because the published record supports only the coincidence in timing. The reclassification moved 329 vehicles; the series rose by 532 crashes; those are different quantities, and no published summary attributes the rise to the change. A research page that inferred causation from adjacency would be committing the error it spends seven sections warning about.
On the series shown in section three. It is presented as published, year by year, rather than summarized, so a reader can see the shape and locate the boundary themselves rather than taking our description of it. The bars are proportional to the values shown beside them and every value label sits outside its bar, so nothing depends on reading text against a coloured fill.
On retrieval. Every figure on this page was taken from the publication named beside it while this page was being written. None was written from memory and then attributed. If a later editor updates the series, the correct method is to retrieve the current edition rather than extending the numbers here.