title: High-speed rail
context: 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.
question: How fast do high speed trains go?
answers: in excess of 250 kilometres per hour (160mph)