It's one of those things you've seen your entire life and probably never thought much about. There's that iconic blue shield shape with a white number inside and a single word on a white background: "Interstate." It could've been so much worse.
There's way more to building a road than just slathering some asphalt all over the ground. The process is actually pretty involved, with a bunch of steps you probably hadn't thought of. And even a little bit of art to it.