Apple has reportedly postponed its voice-controlled autonomous electric car project in the U.S. Apple prefers to focus on artificial intelligence.

The project represented “several billion dollars” and “would have propelled it into a whole new sector of activity,” according to Bloomberg. Several American automakers have eased off on electric vehicles in recent months because demand is not growing as quickly as expected, according to a report in The Wall Street Journal. The decision could also have had an impact on the economic environment.