Mastodawn

In the United States, more than twice as many people die in motor vehicle accidents as in the European Union

The EU population is 450 million people with an average density of 106 people/km2. The US is 350 million at 33 people/km2.

There are probably better metrics than straight density.

I think that’s also a big point, US is all urban sprawl, and that make it hard to build public transport.

That’s average density, but a lot of the US is empty. The more empty places there, the more places that are denser than the average.