Model Railroad Track

Model Railroad Track

Identify your scale, rail code and track system

Read the markings on your existing track before buying a replacement or planning an extension.

Start with the scale

Find a box, molding or part number that identifies the scale of the line you own. A similar-looking HO and N track section can have a near-matching length while using a different gauge and connector.

Check the rail code separately

On conventional track, the code describes the nominal rail height in thousandths of an inch. Look for the label on the exact part. A track-height change calls for a planned running-surface transition.

Match the system at the joint

Check the rail ends, tie height and the roadbed locking parts. For a molded-roadbed family, start with pieces documented for that family before choosing a transition to another system.

Source documentation

Guide questions

Can equal rail codes guarantee a fit?

Compare the actual joiner, tie height and roadbed. The rail code gives one part of the fit.

Why check both gauge and roadbed?

The gauge identifies the rail spacing. The roadbed and connectors determine how the track pieces physically meet.

Where can I verify the part number?

Use the package label or the maker’s part drawing and compare the identifier with the product you intend to order.

Which accessory suits the job?

  1. The Kato HO 2-140 and N 20-020 are close in length. Match the scale and connector before ordering, even if both pieces fit the gap on a drawing.

  2. Atlas identifies the 168 as HO Code 100 and the 500 as Code 83. Select the rail profile that matches the adjoining pieces or plan a documented transition.

Accessories in this guide

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