Ever wondered how the highway and interstate numbers came to be? What do they even mean if they mean anything at all? Behind those numbered shields displayed on the signs is a mathematical logic grid ...

Imagine cruising down the open road, the hum of the engine beneath you, the wind in your hair, and the American landscape stretching out before you. Now, imagine that every sign you pass, every exit ...

The story of America’s interstates is usually told as a straightforward tale of postwar progress, but the real origins are ...