I’ve seen several people writing about Tom Vanderbilt’s thought-provoking, Traffic: Why We Drive the Way We Do (and What It Says About Us) . Every few pages there is a good idea that leads you down some mental rabbit hole. I have highlighted passages and dog-eared pages on the Kindle every time I sit down to read it. The universal experience of driving has turned us all into amateur psychoanalysts navigating complex social interactions, so the book’s popularity is understandable and says a lot about how much is going on while we’re just driving.