Prototype Railroading

Mainline / Main Line

The primary through route on a railroad, typically handling the most traffic.

Full Definition

The mainline is a railroad's primary route, handling the most traffic and highest speeds. Branch lines and spurs connect to the mainline. On model railroads, the mainline is usually the most visible track, often with the smoothest curves and best scenery. Mainline operations differ from switching on branches.

Examples

•Mainline trains might run 60 mph while branch line trains are limited to 25 mph

Tips & Best Practices

Give the mainline your best trackwork and smoothest curves

Related Terms

Branch Line

A secondary rail line connecting to the mainline, often serving local industries.

Yard

A complex of tracks where trains are assembled, broken apart, and cars are sorted.

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