Nobody has mentioned the Roman Military and the concept of the Fighting Engineers.
Our military practically rebuilds a country as we go, much the same as the Romans did.
Although Ike admired the German Autobahns, the idea of military roads was entirely Roman. So Ike built our Interstate highway system. Look on th U.S. map and you can see that every I-state connects military bases.
which was definatly nice while i was in the military, rarely had to get off the beaten path. when i was living in england, unless i was driving, i would get sick if i wasnt on a roman road, they were the only roads that were straight!!!