The Gauge Change Train was a Japanese research and development project launched in 1994 to create a high-speed train equipped with variable-gauge axles, enabling through operation between the 1,435 mm
The first-generation train on the Yosan Line in May 2003
The second-generation set undergoing testing on the Yosan Line in Shikoku in September 2012
The third-generation train, FGT-9000, on test in November 2014
One car of the first-generation set stored at Tadotsu Works in July 2008
"Train on Train" is a term used in Japanese rail transport. It refers to the concept of piggybacking, carrying narrow-gauge wagons on broader-gauge flat wagons. "Train on Train" uses a similar concept
Gauge Change Train
…Super Tokkyū, the concept of building narrow-gauge lines to Shinkansen standards Train on Train, an experimental concept for conveying narrow-gauge container wagons on Shinkansen tracks Takao, Kikuo; Uruga, Kenichi (August 2003), "Gauge Change EMU…
A "Train on Train" experimental mockup at Naebo Works, October 2008
Mock-up wagons at Naebo Works, April 2007