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Show How to Tell a Train's Speed. Count the clicks of the wheels on one rail (because Joints alternate) for 20 seconds, and the result will be the miles per hour the train Is run ning. There are 176 30-foot rails Ir. 5,280 feet. The train, say. Is traveling at 45 miles per hour It covers 125.E rails in one minute, or 2.25 rails in one second, which, multiplied by 20, equals 45 rails In 20 seconds, or 45 miles per hour If 32-foot rails are used the re-suits re-suits would be 40 rails In 20 seconds at 45 miles per hour, bill it Is fairly accurate and can be done easily with a little practice. |