Upgrading Transit for the Twenty-First Century

  • Steven E. Polzin
  • Daniel Sperling


In the United States, cars have increased their dominance over public transit. Overall, transit accounts for only about 2 percent of passenger trips in the United States and about 1 percent of passenger miles. Even in the developing world, transit has lost market share to cars. Public transit is struggling. As the world changes, public transit needs to reinvent itself.

Copyright information

© Daniel Sperling 2018

Authors and Affiliations

  • Steven E. Polzin
  • Daniel Sperling

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