North Raleigh Model Railroad Club

NTRAK Module Information

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Table of Contents
Module Information
What is NTRAK
What is an NTRAK Module
Special Features
Module Images

Introduction

The module is the basic component of an NTRAK layout. Details of the modules that will be part of a layout, whether at a local clubhouse or at a train show, are vital to the successful design of the layout, in which various modules are interconnected.

What is NTRAK

NTRAK is one of several model railroad module standards. It is the most popular standard for use in United States N scale. NTRAK allows modelers to participate in a large layout but only invest a small amount of space in their own home. Any module can be connected to and operated with modules from any club or group that follows NTRAK standards. The modules are tables that "C" clamp together to form large N scale train layouts at various locations such as conventions, shopping malls, club rooms, and as home layouts. The basic module is two feet wide, four feet long, and 40" high. Additionally, there are optional sizes and track locations to give a great deal of flexibility.

NTRAK layouts offer close up viewing, correctly proportioned scenery and maximum train action. NTRAK layouts allow long trains of 50, 60 or even 100 cars or more.

More information can be found on NRAIL's NTRAK page and elsewhere on this site.

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What is an NTRAK Module

A basic module is a 2-foot deep by four-, six- or eight-foot long section of a model railroad. Other dimensions are possible, but this is the most common.

There are normally three standard tracks on an NTRAK module — the two main lines and a branch line. The main lines are designated (from the front of the module) Red and Yellow. The branch line is designated Blue. Some modules have the branch (Blue) line in an alternate position (Alt Blue) and some modules have a mountain line (Green) at the rear of the module and elevated above the other tracks. All NRMRC modules have the Mountain track.

By connecting modules together, several people can build a layout limited only by the number of available modules and the square feet of available space. The smallest layout would be four corner modules. One of the largest layouts constructed used over 700 modules.

The basic reference for NTRAK modules is NRAIL's NTRAK "How To" Manual, available at NRAIL, or from your local NTRAK club.

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Special Feature Modules

There are many special features that can be added to a basic module to improve its operation and appearance, and enhance the railroading experience presented by the Club. This section defines these special features and their symbols.

Alternate Blue Track	The NTRAK specifications permit an optional placement of the Blue track (referred to as "Alternate Blue"). NRMRC has many modules which feature this line.
Corner Module	Some modules are corner modules. These can be 3' or 4', inside or outside, etc.
Independent Loop	Some modules have independent loops of track for additional trains. These loops may be completely separate, or may connect to the branch Line (Blue) or one of the main lines (Red or Yellow).
Industrial District	Some members have constructed modules featuring industries and associated trackwork. These are designated as "Industrial District" modules. They provide locations for trains to drop off and/or pick up cars.
Junction Module	This is a special-purpose module which permits the joining of multiple module loops together along a "backbone" to create a larger layout.
Military	Some modules include things of a military nature.
Mountain Subdivision	The NTRAK specifications permit an optional "Mountain Subdivision" track (referred to as the "Green Line"). All NRMRC modules have the Mountain track.
Siding	Some modules feature a passing siding(s) connected to one of the main tracks.
Weird	Some modules are just plain strange...
Yard Facility	In order to provide a facility for deploying and recovering trains, several members have constructed modules featuring yards. These tend to be busy places for keeping trains running during a show.

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NTRAK Module Images

Below are several examples of NTRAK modules.

Break Neck

Red Rock

Gray Rock Corner

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Last updated: Thursday, February 12, 2026

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