"This “love affair” was coined, in fact, during a 1961 episode of a weekly hour-long television program called the DuPont Show of the Week (sponsored, incidentally, by DuPont, which owned a 23 percent stake in General Motors at the time). The program, titled “Merrily We Roll Along,” was promoted by DuPont as “the story of America’s love affair with the automobile.”
The show aired at a time when cars were facing steep criticism, as plans for the new interstate system threatened to destroy or disrupt neighborhoods in many U.S. cities.
http://www.washingtonpost.com/blogs/wonkblog/wp/2015/01/27/d...