While Jason and I were driving cross-country late last year, we tried to clear two states a day to make sure that we'd get to the west coast on time. This usually meant setting out at 1000 hours local time, loading our luggage into the TARDIS, and putting the pedal to the metal. This usually wan't too big a deal because we usually started a day's travel from a half to a third of the way across a given state to begin with. Near the end of our journey, however, the only viable route meant clearing the state of Arizona …