HO scale model trains are a significant part of model railroading history, and we can partially credit the overall popularity of model trains with the rise of a convenient, tabletop scale like HO.

In the January 2025 issue of Model Railroader ... No. 6 in the yards, and No. 4 in the steel mill and industrial areas. The maximum grade is 2%. The HO scale layout, built with L-girder benchwork ...