When a bus suddenly veers into the right-hand lane, the sensors in the “robotaxi” briefly go into a spin and the onboard computer slams on the brakes – even though the highway lane ahead is clear. This sudden manoeuvre prompts a lorry to nip by on the left and the autopilot has to counter-steer in a hurry. Road behaviour like this is common in the Chinese capital Beijing since if you want to get from A to B in Yizhuang district, which is characterized by factories and tall office towers, you can now order an autonomous taxi without a driver. In terms of value for money, it is definitely worth …