Americans are starting to lose some of their hesitations when it comes to cars that can drive themselves, a new AAA study released Wednesday finds.

While a majority of drivers still say they’d be afraid to ride in a self-driving car, the percentage has taken a significant drop from early last year, the national travel organization says.

In the new survey, 63% of U.S. drivers say they’re fearful of taking a spin in a fully self-driving car. A year ago, the figure was 78%. That equates to 20 million more people who are now more comfortable with the idea.

“The decline is definitely noteworthy,” says Greg Brannon, director of automotive engineering for AAA, based in Orlando, Florida. The study comes as automakers and tech giant alike are rushing to develop self-driving cars. They could go on sale within five years.

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