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Just for clarification, do you mean America as in the US or the continents? Because that's a population of ~330 million vs 1 billion.
If you mean the continents, then the population would be comparable to India.
Edit: just googled, the US alone has 46k deaths a year, meaning a lot higher per capita.
But there's also quite a lot more road activity in the US, I reckon.
Either numbers are way, way too high...
"More than 110,000 people are killed each year in road accidents across India, according to police." For comparison America has about 46,000 deaths in accidents