Chongqing Changan Automobile Co., Ford Motor Co.’s partner in China, said it completed a 1,200-mile road trip to test a self-driving car as part of its ambitions to produce highly automated vehicles by 2020. The car set off from the company’s headquarters in Chongqing and reached Beijing after six days, the automaker said in a statement to the Shenzhen stock exchange. The driverless car employed cameras and radar to test automatic cruising, lane-keeping and changing,…