Por qué algunos camiones llevan una bola metálica colgando del espejo

There's a detail that millions of people see every day from their cars without understanding a thing about what they're looking at. A small metal ball hanging from a truck's rearview mirror. Sometimes chrome, sometimes black, swaying slightly with the vehicle's movement. It looks like a decoration. It looks like the driver's whim. It seems, if anything, insignificant. But that small metal ball can be the difference between an uneventful trip and a serious accident. It can be a work tool disguised as decoration. It can be a physical indicator of the vehicle's dynamic condition that long-haul drivers have been using for decades, while the rest of the world drives past without a clue. In this video, we reveal everything that ball means, why it's there, what information it gives the driver, and what it says about the world of heavy transport when someone decides to really look. A small detail. A huge story. Turn on notifications and subscribe so you don't miss any more secrets of heavy transport. #HeavyTrucks #TruckSecrets #HeavyTransport