{{Railway signal mast}} is a template for displaying signals on a mast for demonstration of railroad signalling aspects. It displays up to three signal heads using spotlight, one of two types of semaphore, or positional signals, along with a base and modifier plates.
{{Railway signal mast|top signal|second signal|bottom signal|plate=|type=|align=|size=}}
Signal indicators
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A bare signal mast section is indicated with "x". Other indicators are dependent on the type parameter.
| Type
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Red
|
Yellow
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Green
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White
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Other
|
Notes
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| Light
|
R |
 |
Y |
 |
G |
 |
W |
 |
blank space |
Standard spotlight-style indicators. Lower-case letters indicate blinking lights.
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| Semaphore
|
R  |
|
Y |
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G |
|
|
|
blank space |
Modern upper-quadrant, 3-position semaphore signals.
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| Sema2
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R |
|
|
y  |
G |
g |
|
|
blank space |
Lower-quadrant, 2-position semaphore signals. Upper-case letters indicate a main signalhead, while lower-case indicates an advance signalhead.
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| Positional
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R — |
|
Y / |
|
G | |
|
W \ |
|
blank space |
White light positional shield. "W" indicates the permissive aspect, while "Y" indicates the advance aspect.
|
- base - Mast base chooser: Gantry, Base
- plate - Plate modifier for the mast: Res, Yel, SPS, <none>
- type - Signal type: semaphore, sema2, light
- align - Diagram alignment: left, center, right
- size - Scales diagram by percentage (do not use "%"): 100
Examples
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| Light mast (default)
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Uses plate= parameter
{{Railway signal mast|W|y|G|plate=Yel}}
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| Semaphore mast
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Uses size= parameter
{{Railway signal mast|R|Y|x|type=semaphore|size=150}}
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| 2-position semaphore mast
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Uses align= parameter
{{Railway signal mast|G|y|x|type=sema2|align=left}}
{{Railway signal mast|R|g|x|type=sema2}}
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| Positional light mast
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Uses size= parameter
{{Railway signal mast|R|Y|G|type=positional|size=60}}
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| Gantry
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Note that at the default right alignment, masts are specified right-to-left.
{{Railway signal mast|w|R|R|base=gantry|plate=SPS}}
{{Railway signal mast|R|Y|g|base=gantry}}
{{Railway signal mast|R|R|R|base=gantry}}
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| Dwarf, medium, and tall masts aligned
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{{Railway signal mast|-|-|R|plate=Res}}
{{Railway signal mast||G|x|plate=abs}}
{{Railway signal mast|r|x|x}}
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| Non-aligned masts
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{{Railway signal mast|R|type=positional}}
{{Railway signal mast|G|x|x|type=semaphore}}
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