Dewe

This is heavily dependent on incident report rates. Incidents are underreported in countries where insurance doesn’t require police reports and/or litigation risk is much lower.

Deaths are pretty well recorded, and there you see that the US is much higher in vehicle deaths per capita. Deaths per billion vehicle-km is also useful, as you can argue that per capita the US drives a lot more, so you will see more incidents due to the traffic exposure being higher.

Summarizing: The US has well over twice as many traffic deaths per capita at 110+ vs 45 in the EU. The worst EU country is Romania with 78. The US is closer when you compare kms driven: about 7 deaths per billion km, still way higher than northern Europe (2-4) and about on par with Belgium (that’s unfortunately not something to be proud of). Quite a bit safer than the lower scoring countries though on that metric, like 14.4 for the Czech Republic.