The National Model Railroad Association (NMRA) is a non-profit organization for those involved in the hobby or business of model railroading. It was founded in the United States in 1935, and is also active in Canada, Australia, the United Kingdom, and the Netherlands. It was previously headquartered in Indianapolis, Indiana, and was based in Chattanooga, Tennessee next to the Tennessee Valley Railroad Museum (TVRM) from 1982 to 2013 and has since relocated to Soddy Daisy. The classifications listed below are from the A.A.R. Individual roads may use other designations. Illustrations show a typical member of the class detailed underneath the following a class description indicates a rare or obsolete type. More information...

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