The TRB Executive Committee will prepare a new version of Critical Issues in Transportation. Critical issues are defined as long-term transportation problems or questions that are currently major policy issues, or are expected to be major policy issues during the next decade. They are issues that are national or global in scope and importance, and on which there is a wide variety of viewpoints. The list will identify priority topics for innovation, research, and policy resolution, but will not include recommendations. TRB will publicize the list for the transportation community, and the public more generally; use it for strategic planning; and use it to guide TRB's future programs, research, and studies.