Most Americans would agree that our transportation infrastructure—from highways, to roads and bus and train lines—needs an upgrade. As governments plan for rebuilding and repairing, our guest takes a historic look at how much of our existing infrastructure was built to reinforce economic and racial divisions. Deborah Archer is an eminent legal scholar, the president of the ACLU, and author of DIVIDING LINES: How Transportation Infrastructure Reinforces Racial Inequality.

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