Current research shows ~850 people die in the US each year from mechanical failures in cars, but underperforming tires breaks etc contribute to far more.

The difference is we don’t do NTSB style investigations after a traffic accident.

The reasons we don’t do NTSB investigations is generally bc of what I said

"Traffic" is a controllable phenomenon, though. We know how to manage it and direct it to achieve our goals.

NTSB investigations of road fatalities, given teeth, would radically change how cars interact with one another.