In the past few decades, the field of transportation has changed dramatically. Deregulation and greater reliance on markets and the private sector has helped to reconfigure the transport industries, while the rise of intermodal goods and global commerce has produced efficiencies of operation and a greater interdependence among transport modes. In a

Introduction. Transportation Systems in the 21st Century. Transportation and Federalism. Transportation Policy. Managing Transportation Systems. Securing and Protecting Transportation.