The international definition of high-speed rail embraces new lines with a top speed of at least 250 km/h (155 mph) and existing lines with a top speed of around .\r
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The international definition of high-speed rail embraces new lines with a top speed of at least 250 km/h (155 mph) and existing lines with a top speed of aro.\r
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MegaStructures - UK Super Train (National Geographic Documentary) MegaStructures - UK Super Train MegaStructures (National Geographic Documentary) .\r
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