Elon Musk: Tesla cars will be able to cross US with no driver in two years

Model S software update allows owners to 'summon' car, which can drive off and park itself, but also curbs AutoPilot features for safety

Tesla's chief executive and serial technology entrepreneur, Elon Musk, has said his company's cars will be able to be summoned and drive autonomously across the US to pick up their owners within the next two years.

The electric car company has rolled out a new version of its Model S and Model X software which gives Tesla's premium automobiles the ability to park in a space perpendicular to the road. They can already do parallel parking and park in a garage, including operating a garage door.