> Road crashes are the leading cause of death in the U.S. for people aged 1-54

This isnt true according to the CDC. Cancer and heart disease lead for the 44-54 group, and while "accidental injury" does lead from 1-44, if you break down the data, in many cases vehicle based accidents are not not the largest single source. For example:

Drowning is the largest single cause in 1-4

Cancer is the largest single cause in 5-9

Suicide is the largest single cause 10-14

https://wisqars-viz.cdc.gov:8006/lcd/home