By the early 1920's, New York City officials new that they needed to fix their automobile traffic problem. Gustav Lindenthal, who designed the city's Hell Gate Bridge in 1917, proposed building a vast web of steel-cable suspension bridges all over the city. Long, cylindrical monorail trains would zip through hanging airways while transporting commuters from the suburbs to skyscrapers. Passengers would enter the airway using elevators installed on buildings.
R.C. Lafferty, a New York engineer, had a similar idea, except that his bridges wold include a motor speedway below the railway. Like Lindenthal, Lafferty favored monorails, arguing that they would suffer less damage over time than traditional train cars. At the time of this article's publication, the New York Transit Commission considered Lafferty's idea a viable solution to the growing congestion of New York City streets.
Read the full story in "Proposes Suspended Railways to Bridge Cities!"