America’s interstate highways look inevitable now, like they were always part of the landscape. But the road system that carries millions of drivers every day began as a national weakness exposed by mud, broken bridges, military frustration, and a future president who never forgot what it felt like to watch an army crawl across its own country.

The vision grew from rough colonial tracks, the Lincoln Highway, Eisenhower’s brutal 1919 convoy, and the unsettling lesson of Germany’s autobahn. By the Cold War, the argument had become urgent: a modern superpower needed roads that could move troops, trucks, families, and entire cities in a moment of crisis.

What followed was construction on a scale almost impossible to picture. Mountains were cut, valleys filled, towns bypassed, suburbs unleashed, railroads challenged, and a new roadside world of motels, diners, gas stations, truck stops, and fast-food signs rose beside the pavement.

Yet the same system that connected the country also divided it in concrete. Neighborhoods vanished beneath ramps and overpasses, local businesses were stranded, and the promise of speed carried costs that still shape American life every time a driver takes the next exit.