Mumford was right in his criticism but not in his reasoning. It wasn’t a love for cars that brought limited-access roads into American cities. It was love of money. To local politicians, the clinking sound of the Highway Trust Fund paying ninety cents out of every road-building dollar was sweeter music by far than the sound of any V8 engine roaring down the highway. A $100 million highway for $10 million? Or, sometimes, since state governments offered their own subsidies, only $4 or $5 million? With hundreds or even thousands of new construction jobs in your district?

