SHANGHAI — Across Eastern Europe, Russia, Kazakhstan and the Gobi Desert — it certainly was a long way to go without getting lost. Four driverless electric vans successfully ended an 8000-mile (13000-kilometer) test drive from Italy to China — a modern-day version of Marco Polo’s journey around the world — with their arrival at the Shanghai Expo on Thursday. The vehicles, equipped with four solar-powered laser scanners and seven video cameras that work together to detect and avoid obstacles, are part of an experiment aimed at improving road safety and advancing automotive technology. The sensors on the vehicles enabled them to navigate through wide extremes in road, traffic and weather conditions, while collecting data to be analyzed for further research, in a study sponsored by the European Research Council. "We didn't know the route, I mean what the roads would have been and if we would have found nice roads, traffic, lots of traffic, medium traffic, crazy drivers or regular drivers, so we encountered the lot," said Isabella Fredriga, a research engineer for the project. Though the vans were driverless and mapless, they did carry researchers as passengers just in case of emergencies. The experimenters did have to intervene a few times — when the vehicles got snarled in a Moscow traffic jam and to handle toll stations. The project used no maps, often traveling through remote regions of Siberia and China. At one point, a van stopped to give a hitchhiker a lift. A ...