In the West, a string of missions along California's coast grew into some of the world's great cities, from San Diego and Los Angeles in the South to Sacramento and San Francisco in the North.
Well, one engineer, Tim Casselman, believes it's possible. And his home city of Sacramento, California should see the technology's first test as part of the upgrading of its rail yard.
一位工程师 Tim Casselman 认为这是可能的。他的家乡加利福尼亚州萨克拉门托市作为其铁路场地升级的一部分,应该见证这项技术的第一次测试。