The world’s first autonomous tram went on its first ride in Potsdam, Germany, last week. The AI-powered train quietly rolled along a 3.7-mile section of test track through the city in real traffic, even slowing down for teenagers who forgot to look both ways before crossing the street. The only difference between your average inner-city tram and this one was that the conductor wasn’t touching the controls, but was just along for the ride, according to the Guardian.Melissa Locker (Fast Company)