How the interstate highway system connected — and in some cases segregated — America

This article is the second in the series “Equity and Infrastructure: How Infrastructure Influences Social Equity,” which is being published by Civil Engineering magazine and the Civil Engineering Source over the next several months.

The federal interstate highway system was a momentous undertaking, by some accounts the largest public works project in the history of the world. Writer Tom Lewis, in his 1997 book, Divided Highways: The Interstate Highway System and the Transformation of American Life (New York City: Viking Penguin), described the scale thusly: “Imagine the state of Connecticut knee deep in earth; that’s how much was moved

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