Apple is now allowed to test self-driving cars in California, according to the state's Department of Motor Vehicles' webpage. Few details have been revealed about Apple's autonomous driving plans, but the company has hinted about its interest in the field recently. In December, Apple confirmed in a letter to the National Highway Traffic and Safety Administration it has invested in "the study of machine learning and automation." The company was reportedly working on its own car, but as the Financial Times reports, it has since shifted its current focus to developing software and systems that would power autonomous tech in self-driving cars. Companies that are testing self-driving cars on public roads in California are subject to several rules and regulations.