Transportation dominates our daily existence, and thousands, even millions, of miles are embedded in everything we do and touch. Now, the way we move ourselves and our stuff is on the brink of great change, as a mobility revolution upends the car culture that built modern America. Making use of interviews, data, and exploration of the hidden world of ports and traffic control centers, Pulitzer Prize-winning journalist Edward Humes tracks his own family's commutes, traffic jams, grocery stops, and online shopping excursions as a springboard to explore the challenges inherent in our system. Transportation is one of the few big things we can change, and as Humes suggests here, that fork in the road is coming up fast.