One truck operating out of a terminal in Phoenix can service more stations in Phoneix then the same truck operating out of a terminal in Tuscon in the same amount of time. So to get the same amount of gas to the Phoenix stations you have to add a whole lot more trucks or drive teh same trucks more hours in the day. This can't be done because normally people don't have fleets of fuel trucks sitting around doing nothing, they are servicing other comunities. And since you can't add mroe hours to the day then you end up with less gas.
