> This is probably the best we can reasonably do but even this doesn't show the whole picture.

Well, the numbers I gave only concern "deaths by vehicles", not "accidents". ("Accident" is a misnomer as it's a marketing term used to normalize car collisions - https://en.wikipedia.org/wiki/Accident#Accidents_by_vehicle .)

The death rate increases with speed, and I think US policies encourage higher speeds than the UK. UK cars also tend to be smaller and lighter, which reduces the size of the blind spots and the fatality rate of collisions.

We can surely do better than my stats as there are a lot of publications on this topic.