The Shinkansen

The Houston to Dallas high speed rail train will be built with the cooperation of Japan's Central Railway, a longtime successful and profitable operator of Shinkansen bullet train lines. Securing the private financing is key to the project.
Aug 20, 2014   The Texas Tribune
The line may only be 12 miles, but the train speeds at 312 mph. The Secretary of Transportation was in Japan as part of the effort to bring high speed rail to the U.S. though it's not clear whether he is in fact considering the maglev technology.
May 17, 2010   The New York Times - Global Business