Attribute |
Scope |
Type |
board
|
Public
|
|
Notes:
|
a board is a panel that expresses one (unchangeable) signal aspect<br/>
|
|
light
|
Public
|
|
Notes:
|
a signal with lamps<br/>
|
|
pole
|
Public
|
|
Notes:
|
the signal aspect is expressed via a color code painted on the pole<br/>
|
|
semaphore
|
Public
|
|
Notes:
|
a signal, where the signal aspect is expressed by the position of its movable arms<br/>
|
|
virtual
|
Public
|
|
Notes:
|
signal has no physical presence on the track. Command is passed in some other way, e.g. radio<br/>
|
|