A little off topic, but to pick up from Alan’s post on Vanderbilt’s book, Traffic. Excellent read. Lots of notes and references on the subject matter: State, federal and international laws and policy, sociological and psychological studies, traffic engineering analysis and procedures, etc. It’s nice because if there’s an issue covered in the book, for which you want to learn more about, or that you may have a differing opinion, then you can follow the reference for clarity.
The Carnegie has a hardcopy, two CD’s and an audio download of the book.