The very title is as ridiculous on its face as is the underlying idea. It suggests that the car is a being of its own that the city was built for. It doesn't occur to the author that each car has at least one person in it. Almost always that person is driving so she may interact with other people, work with other people, or transact business with other people, or he is himself driving for a business that is doing work for other people.

The city was built so people can get around and interact with others. The means by which people are doing this is cars and trucks. The city is indeed built for people, which is precisely why the city accommodates cars: they are immensely useful means of transportation. It's ridiculous to suggest the city is "built for cars" as though the car is some sort of being with wants and demands. The car is serving the people of the city.