建立从洛杉矶到旧金山的真空列车线路之前,必须先在8公里的轨道上试车成功。2013年,埃隆·马斯克(Elon Musk)有了一个新的构想,让悬浮舱中的乘客以接近音速通过一个真空管道,只需要30分钟就能从洛杉矶抵达旧金山,比目前高速列车所需的2小时40分钟要快得多。这个他称为“超回路”(Hyperloop)的真空管道的建造将花费60亿美元,而音速火车的制造还将 Before setting up a vacuum train line from Los Angeles to San Francisco, you must first test your car on an 8 km track. In 2013, Elon Musk introduced a new concept that allows passengers in a suspended cabin to pass through a vacuum pipe at near-sonic speed, arriving in Los Angeles from San Francisco in 30 minutes, less than what is required for today’s high-speed trains 2 hours 40 minutes is much faster. The construction of a vacuum pipeline he calls “Hyperloop” will cost $ 6 billion, while the manufacture of sonic train will