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Some diamonds have moveable points; these are usually on very small angles (dictated by engineering considerations, location of intersecting lines, etc.), like 15 or so degrees. Frogs on angles that small have long spaces between the running rails, and the moveable points are intended to close them up. <br /> <br />Back in the glory years, the Milwaukee Road had a speed restriction in its Chicago-Milwaukee District timetable: "Reduce to 100 MPH over EJ&E crossing at Rondout." Amtrak still goes over the Rondout diamond at better than 70 . . . <br /> <br />Old Timer
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