query: How fast do high speed trains go?
passage: 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 250 kilometres per hour (160mph) and existing lines in excess of 200 kilometres per hour (120mph) 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.[1] 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.
passage: High-speed rail in India
In India, trains in the future with top speeds of 250–300 km/h, are envisaged to run on elevated corridors to isolate high-speed train tracks and thereby prevent trespassing by animals or people. The current conventional lines between Amritsar-New Delhi, and Ahmedabad-Mumbai runs through suburban and rural areas, which are flat and have no tunnels. The Ahmedabad-Mumbai line runs near the coast and therefore, has more bridges, and parts of it are in backwaters or forests. The 1987 RDSO/JICA feasibility study found the Mumbai-Ahmedabad line to be the most promising.