 PLOT: When Jack, Frank, and Jason are driving to Manhattan through  the blizzard, Jason says theyre "just north of Philadelphia" when  the car crashes and they have to walk. Jack later says that theyre  still 40 miles from New York. Walking the approximately 70 miles  from the car crash to Manhattan would be impossible in those  conditions. In perfect weather, with food, water and supplies, and  in optimal fitness, it would take a minimum of three days to make  that walk. They were in blizzard conditions, probably exposed to  near