An autonomous tram developed by Siemens has started street tests in Potsdam , Germany , but with a safety driver on board . Along the track, the occasional tram spotter with a notebook and camera captured the historic moment. The self - driving tram uses radar , motion sensors and cameras to detect potential hazards and respond to trackside signals while navigating a safe route . However , the tram 's developers said the AV is still some distance from being commercially viable .
An autonomous tram developed by Siemens has started street tests in Potsdam , Germany , but with a safety driver on board . The self - driving tram uses radar , motion sensors and cameras to detect potential hazards and respond to trackside signals while navigating a safe route . However , the tram 's developers said the AV is still some distance from being commercially viable .