- Highway Post Office
Due to the continual withdrawal of so many
Railway Post Office (RPO) trains, thePost Office Department decided to experiment with the distribution of mail on large buses, equipped somewhat like RPO cars. On February 10, 1941, experimental service started on theWashington, DC &Harrisonburg, Virginia HPO. It was a success from the start, but, due toWorld War II , expansion of this service was delayed for several years. After the war, the service increased rapidly, with more than 130 routes established between 1948 and 1955. As this service was somewhat enmeshed with the RPO service, its value decreased when RPOs were abolished. The last service of this type to operate in the U.S. was theCleveland, Ohio , &Cincinnati, Ohio HPO, which was discontinued in 1974.Source: * Wilking, Clarence. (1985) "The Railway Mail Service",
Railway Mail Service Library ,Boyce, Virginia . Available as an MS Word file at http://www.railwaymailservicelibrary.org/articles/THE_RMS.DOC
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