With 1.1 million cars registered in a city of 6 million people, the proportion of people with a car is one of the highest in China. And a further 900 cars are registered in Kunming every day. Yes, every day! Add to that the nearly 2000 fatalities from traffic accidents in Yunnan every year and you start to see the problem. Kunming's government are trying to tackle the increasing pollution problem by requiring cars to pass an exhaust test, and are asking motorists not to use their phone while driving, to stop driving through red lights and not to change lanes at random. Somehow I doubt the driving will improve that quickly.