<prompt> Translate the following text to EnglishUwezo wa posta ni idadi ya vituo vya utoaji ambavyo vinaweza kutembelewa na mtoaji katika saa moja, bila kujumuisha muda wa kupakia na sehemu ya muda wa kuingia na sehemu ya muda wa kusafiri kwenda na kutoka kwa njia.  <response>: Postal density is the number of delivery points that can be visited by the carrier in one hour of time, excluding loading time and the variable portion of access time and the variable portion of travel time to and from the route. 