Arthur Radebaugh's Closer Than We Think! strip for the May 21, 1961 Chicago Tribune envisioned a Monoline Express of the future. Below is the text of the strip.
Two ideas now being developed in Detroit - an automatic highway and a high-speed monorail bus system - are combined in the concept of the Monoline Express, in which private automobiles will use a novel "high road" to commute to town or travel between cities.
General Motors proposes the "autoline" - a computer-controlled highway in which cars would travel almost bumper to bumper at speeds of 120 miles per hour or more. And a business group wants to see the two sections of the University of Michigan campus linked by a "monobus" which would move on a novel monorail guide trough up in the air. Put together, the two concepts result in automatic travel in your own car at light aircraft speed!