One Historian said....

I agree to some extant with the statement "Without the new automobile industry,the prosperity of the 1920's would scarcely been possible." Without automobiles, transportation would still have been very hard for the average citizen and the billboard advertisement on the side of roads wouldn't have been possible. But trains were still used and billboards could have just as easily been set up down train tracks. I feel that even if the bike industry took off in the 1920's other businesses would have found a way to make money off of it. I feel that it is a little too bias to say that it was the automobiles that made the U.S. what it is today because honestly it could have been anything, the automobile was just first.

20 words on the boom. question 3

The big boom was focusing more on industrialization, cities and transport. Skyscrapers were being build along with cars and roads.