Construction of the 1,911-mile transcontinental railroad connecting California with the eastern half of the United States began in 1863, while the nation was engaged in a bloody civil war, and was completed six years later when its two legs were joined at Promontory Summit in Utah. California’s bullet train project was launched in 2008 when voters passed a $9.95 billion bond issue on promises that it would be completed by 2020, whisking passenge…