List of high-speed railway lines

This article provides a list of operational and under construction high-speed rail networks, listed by country or region. While the International Union of Railways defines high-speed rail as public transport by rail at speeds of at least 200 km/h (124 mph) for upgraded tracks and 250 km/h (155 mph) or faster for new tracks, this article lists all the systems and lines that support speeds over 200 km/h (120 mph) regardless of their statuses of upgraded or newly built.

Source: Wikipedia — List of high-speed railway lines (CC BY-SA 4.0)