Geddes' "vision of the future" was rather achievable; the most advanced technology posited was the automated highway system of which General Motors built a working prototype by 1960. Futurama is widely held to have first introduced the general American public to the concept of a network of expressways connecting the nation. It provided a direct connection between the streamlined style which was popular in America between 1928 and 1938, and the concept of steady-flow which appeared in street and highway design in the same period.