On board the driverless lorries hoping to transform China's transport industry

They rumble down the highway between Beijing and Tianjin port: big lorries, loaded up and fully able to navigate themselves. Sure, there is a safety driver in the seat, as per government regulations, but these lorries don't require them, and many analysts say it won't take long before they are gone. When "safety driver" Huo Kangtian, 32, first takes his hands off the wheel, and lets the lorry drive itself, it is somehow impressive and disconcerting in equal measures. For the initial stages of the journey, he is in full control. Then - at a certain point - he hits a few buttons, and the powerful, heavy machine is driving itself, moving at speed along a public road to Tianjin.