American cities need no comparison, but their traffic is really developed and convenient, and the traffic order is surprisingly good.

When Shen was in college, he heard a professor say that if he was to judge the prosperity of a city, he would not go to see any high-rise buildings, big summer and financial district, but to see the traffic of the city first. If a city did not have good traffic planning and order, how far could the city develop in the end?

Obviously, traffic is the blood of a city, and the blood is not smooth. Should the development of this city be finalized early? To a limited...