Elon Musk says tunnels are the answer to 'traffic hell'

LONDON, ENGLAND - Saturday, June 7, 2014: CEO & Chief Product Architect Elon Musk plugs in a Supercharger to a right-hand drive Model S at the UK launch of Tesla Motors' Model S electric car at the Crystal. (Pic by David Rawcliffe/Propaganda)

Tech billionaire Elon Musk has reaffirmed his statement that the solution to gridlock is building tunnels beneath major cities.

The Tesla and SpaceX CEO first mentioned his idea for a new project in December last year, tweeting: "Traffic is driving me nuts. Am going to build a tunnel boring machine and start digging."

He later added that he would call his new endeavour 'The Boring Company', leading many to believe it was all just a joke.

However, yesterday he appeared to back up his claims that he was serious by sending another tweet. "Exciting progress on the tunnel front. Plan to start digging in a month or so," he wrote.

When someone replied asking if he was serious, he simply replied: "Yup."

It'd be easy to write off Musk's elaborate plans to fix congestion, but this is the man who made electric cars cool and pushed the conversation about autonomous cars into the mainstream.

He also runs a company that builds spacecraft with the ultimate goal of colonising Mars 'in our lifetimes'.

Speaking to US technology site The Verge via Twitter's private messaging service, Musk said: "Without tunnels, we will all be in traffic hell forever

"I really do think tunnels are the key to solving urban gridlock. Being stuck in traffic is soul-destroying. Self-driving cars will actually make it worse by making vehicle travel more affordable."

Asked where the tunnel would be built, Musk joked that it would start from his desk at SpaceX. However, he implied that Los Angeles would be the first to benefit from his boring project.