You don't need a speedometer on a train. To approximately gauge the speed, just note the number of clicks you hear in 20 seconds (not guaranteed accurate if someone nearby is using a computer mouse.) That number will be close to the speed in miles per hour.

But this will not work on the Continent, where speed is measured in kilometers per hour. Ok, so there you'll count the klicks.

Source: 2201 FASCINATING FACTS

Siderodromophobia is the fear of trains and railways....

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