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Choose a Page:Which were the biggest locomotives...Who built the first locomotives?What were the first railways used for?What is the record speed for a train?What was the biggest gun train eve...When was the first underground rai...Which is the world's largest under...What does 'gauge' mean on railways?*What is a monorail?*How does streamlining speed up trains?Are steam trains still being built?What is the fastest train in use t...Which are the longest rail and met...What sort of motors power today's ... What is a monorail? A monorail is a railway that has only one rail. This reduces friction and allows the trains to move faster and use less energy. On most monorails the train rides on top of a concrete beam. Magnetic levitation (Maglev) trains of the future will use a magnetic field to 'float' over the track, eliminating friction altogether. A Maglev train   Previous: Back Book: 1001 Section: Science and Technology Chapter: Railways