The real reason why every railroad in America has the same rocks lining the tracks

Railroad tracks run all across America. It's nearly impossible to drive through a town, no matter how small, without coming across a set of railroad tracks. But have you ever looked down and wondered why every railroad track you see has the same rocks surrounding the tracks?

There's never a variation of colors, shapes, or sizes. You never see railroad tracks surrounded by pebbles or sitting…

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