Autonomous shuttle with a demand responsive transit (DRT) system South Korea's autonomous transportation startup 42dot, owned by Hyundai Motor Group, on Monday unveiled a driverless electric shuttle installed with a demand responsive transit (DRT) system. The autonomous shuttle, dubbed aDRT, is a purpose-built vehicle (PBV), or an eco-friendly multi-purpose mobility vehicle. It was built for driverless public transportation from the design stage, unlike a conventional self-driving vehicle installed with an autonomous driving kit, the company said. The eight-seat PBV not only drives rotating routes, but also plans optimized routes depending on demand to improve user convenience. It can accommodate up to seven passengers, as well as one seat for the safety guard, and drive up to 300 kilometers on a single charge.