List of high-speed railway lines
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This article provides a list of operational and under construction (or approved) 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.[1][2]
For proposed extensions or networks of high-speed rail, see Proposed high-speed rail by country.
This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources.