When firms and people are located near each other in cities and in industrial clusters, they benefit in various ways, including by reducing the costs of exchanging goods and ideas. One might assume that these benefits would become less important as transportation and communication costs fall....

We predict the amount, share, and value of land dedicated to roadways within and across 316 US Primary Metropolitan Statistical Areas. Despite the amount and value of land dedicated to roadway, our study provides the first such estimate across a broad range of metropolitan areas. Our basic...