Hitler built the Autobahn’s because of his romantic fascination with the old Roman roads. He even defined fascism as “a spontaneous return to the traditions of Rome.” He believed the Autobahn’s could help bring back the Greco-Roman empire under firm Nazi control. The autobahn’s were built so tanks and military equipment could be quickly dispatched to any border very quickly. Eisenhower did not build the freeway system in America with these ideas in mind.
I hear Hitler got the idea of Autobran from Fritz Lang classic movie Metropolis
I don’t know if you have hear of that story
Actually, the Interstate Highway System was built with the military in mind. Many stretches of road were deliberately designed to serve as airstrips.