Watch Elon Musk's underground 'loop' test track launch - video

The Tesla founder unveils his latest visionary project - a tunnel beneath LA that his Boring Company says will revolutionise urban transport.

Musk described the development as 'incredibly profound' as he showcased his tunnel-boring technology and driverless vehicle to assembled media

• Visionary tunnel or over-hyped hole? Elon Musk's design unveiled in LA