The August 3, 1958 Chicago Tribune ran this Closer Than We Think! strip, demostrating the automatic highway construction of the future. Something very similar to this appears in the May 14, 1958 Disneyland TV episode Magic Highway, U.S.A..
Tomorrow's turnpikes will "flow" out of giant machines like magic ribbons across the countryside. The basic equipment is already in existence; only a few improvements are needed.
The forward section of such a road-builder would be a variant of the new jungle-smashing LeTourneau "tree-crusher" combined with a grader. The middle section would pour concrete in a never-ending flow, with the rear portion leveling the still soft pavement. A line of freight helicopters would be on hand to feed the behemoth with the material necessary to keep it moving across any type of country.