Car crashes aren't typically included in "violent deaths", because the definition of "violence" typically includes intent: https://en.wikipedia.org/wiki/Violence
I thought about specifying some form of "human induced killing" but couldn't figure out how to word-lawyer it to be the group consisting of "murder + suicide".
~38k people died in USA [1] from car crashes. Thats pretty violent but doesn't necessarily count as murder or suicide.
[1]: https://crashstats.nhtsa.dot.gov/Api/Public/Publication/8132....