Postal management uses this tool to redistribute and eliminate overtime costs, based on consultation with the carrier about his/her estimated workload for the day and mail volume projections from the DOIS (Delivery Operations Information System) computer program.
Routes are adjusted and/or eliminated based on information (length, time, and overall workload) controlled by the program, consultations with the carrier assigned to the route, and a current PS Form 3999 (street observation by a postal supervisor to determine accurate times spent on actual delivery of mail).
[citation needed] Rural carriers are under a form of salary called "evaluated hours", usually with overtime built into their pay.
When working a mounted route, letter carriers usually drive distinctive white vans with the logo of the United States Postal Service on the side and deliver to curbside and building affixed mailboxes.
These routes are typically found in outlying areas, or around very small communities.The three types of mail carriers are also hired differently.
They are not United States Postal Service employees and normally receive lower pay than carriers on city or rural routes.
[16] When aviation introduced airmail, the first woman mail pilot was Katherine Stinson who dropped mailbags from her plane at the Montana State Fair in September 1913.
[18] Famous real-life letter carriers include: The coat of arms of Daugailiai, Lithuania features a postman playing post horn.