Canadian inventor Elon Musk stated that the construction of underground speed highway is almost finished. He informed about it on his Instagram page. Musk also promised to launch free trips in some months. The price of tickets then will be the same as above the ground. In 2016 Musk mentioned the intention to construct underground tunnel to fight with traffic jams.
They expect that the innovation will help get to the destination very quickly. The speed of the bus will be more than 240 km per hour.