Japan will commence construction on a maglev line between Nagoya and Tokyo, "a 177-mile trip that will be cut from 95 minutes on today’s high-speed trains to just 40 minutes with maglev by 2027. To put that kind of speed in perspective, Amtrak’s Acela takes about 3 hours and 40 minutes to go about 210 miles. A trip from Boston to New York on maglev would take under an hour."
Construction is expected to take a decade. Critics worry that with declining population trends, there won't be demand for the train by the time it is built.