The groups in New England and the Midwest are discussing standard scenery contours for module ends. Contact us for details. The standards for scenery contours will be only recommendations. The standard is a single-track mainline. An individual can have any number of tracks crossing the internal boundaries of modules that are always to be mated to each other.
Local groups can allow deviations according to their own desires.
Length can be variable, but 4' is about right and is recommended by NTrak. 3' modules are allowed if that is all you have space for. Paired 3' modules offer more flexibility and are particularly easy to transport if stacked. Local groups can decide if they want to create layouts that have inside or outside corners, or use loops at the end of point to point layouts. Modules designed by individuals or partners to be used as pairs or sets can use a different method of joining their modules.