how were our highways originally built?

[Music] Like an endless ribbon in different widths and lengths, our highways stretch out in all directions. Where one leaves off, another begins. Built overwater, underwater, and even on stilts, only an ocean can stop them. [Music] Most people take our roads for granted until they break down. And no matter how well our roads are built, man and nature seem determined to break them apart. [Music] There is a constant matching of strength between the stability of the pavement and the stress it