You make a good point, however if we had to build that system with the sort of big government regulatory nonsense we have now there's no way it would ever get done. The environmental impact studies alone would cripple the endeavor, never mind the unions slowing down production and quadrupling the cost. Then having to reroute everything once some bed wetting ecofascist found a bettle that was a little more green than the other ones, or a puddle was found and the EPA designated it a wetland.
History shows that a less popular reason the interstate highway system was build was, because of the Cold War, we could shuttle troops coast to coast faster and with greater ease. But it sure helped our economy boom and made us all more mobile.
Yea, you raise a good point about "what if" it were to be built today. I don't think unions would be the problem today as much as the tree-hugging fanatics out to save some fuckin' spotted toad.
Interstate Highway System - Wikipedia, the free encyclopedia
"The Dwight D. Eisenhower National System of Interstate and Defense Highways (commonly known as the Interstate Highway System, Interstate Freeway System, Interstate System, or simply the Interstate) is a network of freeways that forms a part of the National Highway System of the United States."