Elon Musk on Tuesday took a break from futuristic electric cars and private space travel to unveil a low-cost tunnel he sees as a godsend for city traffic. The billionaire behind Tesla and SpaceX late Tuesday put the spotlight on the a 1.14 mile (1.8 kilometer) tunnel created by his Boring Company for about $10 million. The sample tunnel is part of Musk's vision to have an underground network that cars, preferably Teslas, can be lowered to by lifts then slotted into tracks and propelled along at speeds up to 150 mph (241 kmh).
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