High-speed rail
High-speed rail is a type of rail transport that operates significantly faster than traditional rail traffic, using an integrated system of specialized rolling stock and dedicated tracks. While there is no single standard that applies worldwide, new lines in excess of and existing lines in excess of are widely considered to be high-speed, with some extending the definition to include lower speeds in areas for which these speeds still represent significant improvements. The first such system began operations in Japan in 1964 and was widely known as the bullet train. High-speed trains normally operate on standard gauge tracks of continuously welded rail on grade-separated right-of-way that incorporates a large turning radius in its design.
High Speed Freight Vehicle
HSFV1 was intended for fundamental empirical research into wheel-rail interaction and suspension dynamics to be better understood, following from work on wheel tread profiles. It was regularly run at speeds of up to 140 mph (225 km/h) on the Vehicles Laboratory's roller rig. It also performed at 90 mph whilst under test on the main line. Its suspension had two vertical coil springs and two vertical and one lateral hydraulic damper at each corner of the vehicle. This was at a time when few freight trains travelled at more than forty mph and most passenger trains averaged about seventy mph. It supported theories of vehicle design which led to most later designs of train.