What type of death is accidental?

Accidental Deaths Accident is defined for medical examiner death certification purposes as an unnatural death resulting from an inadvertent chance happening. Traffic related fatalities (involving vehicles used for transportation on any public roadway) are classified as accidents.

https://snohomishcountywa.gov/806/Cause-Manner-of-Death#:~:text=Accidental%20Deaths,roadway)%20are%20classified%20as%20accidents.