Why Trains Don't Clickety Clack Anymore

By Simple Things - Surprising Histories

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Continuous welded rail is a brilliant piece of modern engineering that quietly revolutionized railway travel. In this video, we explain why trains stopped making their famous "clickety-clack" sound, exploring the history and science behind modern train tracks using real engineering facts. Why Trains Don't "Clickety-Clack" Anymore | Simple Things Surprising Histories This documentary-style episode from Simple Things Surprising Histories covers the evolution of railway engineering, from the classic jointed tracks of the past to the smooth, seamless high-speed rails of today. Topics covered in this video: • What the classic "clickety-clack" train sound actually was • How early jointed train tracks were built and designed • The science of thermal expansion in steel rails • Why traditional train tracks required gaps to prevent buckling • The massive maintenance and speed limits of old railways • What Continuous Welded Rail (CWR) is and how it works • How modern track-laying machines weld

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