It looks like Apple's self-driving (the iCar?) is closer than ever to becoming a reality. Internal Apple documents obtained by The Guardian show that the tech giant has set up an automotive department in an unassuming building a few miles away from its Cupertino complex, Digital Spy reports.

The team has been busy working on the ominous sounding Project Titan, which is Apple's codename for its experiments into building a self-driving car.

Apple has reportedly met with experts from Mercedes Benz, Tesla, BMW and Fiat-Chrysler, and is putting the feelers out for a possible test location.

One potential location is GoMentum Station, which is a disused naval weapons station that will soon be operated as a private self-driving car test track guarded by the US military.

While Apple declined to comment on the rumours, a spokesperson for GoMentum parent company Contra Costa Transportation Authority confirmed that the company had shown interest in using the site.

"We had to sign a non-disclosure agreement with Apple," CCTA's Randy Iwasaki said. "We can't tell you anything other than they've come in and they're interested."

Apple isn't alone in developing self-driving cars. Google's new parent company Alphabet and Uber have both entered into development on such vehicles over the last year.