Since the late 20th century, the USPS has been reducing point-to-point links in favor of a spoke-hub distribution paradigm, with sorting work tightly concentrated at the hubs. During the 2010s, the USPS consolidated mail sorting for large regions into the P&DCs on the basis that most mail is addressed to faraway destinations, but for cities at the edge of a P&DC's region, this means all locally addressed mail must travel long distances (that is, to and from the P&DC for sorting) to reach nearby addresses.
Since the late 20th century the USPS has been reducing point,-to-point links, in favor of a spoke-hub distribution paradigm with sorting work tightly concentrated at the hubs. During the 2010s, the USPS consolidated mail sorting for large regions into the P&DCs on the basis that most mail is addressed to faraway destinations, but for cities at the edge of ,a P&DC's region, this means all locally addressed mail must travel long distances (that is to and from the P&DC for sorting) to reach nearby addresses.