China has rushed ahead in high-speed rail development, at the cost of human life[2] and corruption,[3] but the United States has no need to follow this example. We will mostly be taking long-distance trips here by plane (as we already do) or by car (as we also already do, except with self-driving becoming more and more commonplace). There isn't any particular need in the United States to build new high-speed train lines.
[1] http://www.wired.com/magazine/2012/01/ff_autonomouscars/
http://online.wsj.com/news/articles/SB1000142412788732380820...
http://www.wired.com/autopia/2014/01/safety-self-driving-car...
http://online.wsj.com/news/articles/SB1000142405270230442800...
[2] http://www.nytimes.com/2011/12/29/world/asia/design-flaws-ci...
http://www.newyorker.com/reporting/2012/10/22/121022fa_fact_...
[3] http://www.theguardian.com/world/2013/jul/08/liu-zhijun-sent...