article_snippet.sent: The speeds, however, won't be as high when the new line between Tokyo and Nagoya comes into service.
article_snippet.sent: Right now speeds are limited at up to 400 kilometres (250 miles) per hour due to the excessive air resistance encountered at these speeds.
article_snippet.sent: But vacuum tube designs could allow vacuum tube designs to travel over seven times faster in the future.
article_snippet.sent: Japan is now hoping to bring the technology to the US and has outlined plans for a line between Washington and Baltimore, which will cut travel times between the cities to just 15 minutes.
article_snippet.sent: The speeds, however, won't be as high when the new line comes into service. 