The same problems exist in metropolitan areas in US as well, like Bay Area, NYC, Chicago, etc. although to a less degree than those in China. In Bay Area, people are so exhausted by long-commute driving. Check how jammed the traffic is in 101, 880, 580, 237, etc. Bart and CalTrain's coverages are pretty limited. With self driving cars, I bet plenty of people will quit driving by themselves for the commute. Imagine one can read, relax, read a book, or even work in the car, instead of sitting behind the wheel for 2 hours a day.