Street Smart

On a Saturday morning in December 1973, a section of New York's West Side Highway collapsed under the weight of a truck full of asphalt. The road was closed, seemingly for good, and the 80,000 cars that traveled it each day had to find a new way to their destinations. It ought to have produced traffic chaos, but it didn't. The cars simply vanished. It was a moment of revelation: the highway had induced the demand for car travel. It was a classic case of "build it and they will come," but for the