Other Signals and Indicators Flashcards
(20 cards)
Limit of Shunt (signal or indicator)
What must you not do?
Who can authorise you to do it?
What happens if you pass it without authority?
Stop! No part of the train must pass the Limit of Shunt signal or indicator.
Signaller can authorise you to go beyond it.
Passing it without authority is a SPAD.
Limit of Shunt
Describe the two LoS Boards
Describe the LoS Signal
White board with Red Writing
- Round board with ‘Limit of Shunt’
- Square board with ‘Shunt Limit’
Black box with two red lights at 180°
Describe a Stop Board
A white box
with a red circle
and ‘Stop’ written under it
Instructions underneath
Stop Board
What must a driver do?
When else can you proceed?
What happens if you pass it without authority?
Stop the train at the Stop Board.
Carry out the instruction shown on the board.
You can also proceed when given permission by the authorised person.
Passing it without authority is a SPAD.
Possession Limit Board
Describe a PLB
Red light on top Red board (octagon) with STOP written in white
What does a Possession Limit Board identify?
Where else can it be used?
What happens if you pass it without authority?
PLB identifies the boundary of a possession.
It can also be used as part of the protection for a line blockage.
Passing it without authority is a SPAD.
Describe a Work-site Marker Board
Yellow box
Two flashing red lights on one side
Two flashing yellow lights on other side
Work-site Marker Boards
Where are they provided?
What does two flashing red lights indicate?
What does two flashing yellow lights indicate?
Provided within a possession of a running line.
Two flashing red indicates: Entrance to a work-site
Two flashing yellow indicates: Exit from a work-site
Work-site Marker Boards
Who’s authority is needed to enter?
Who’s authority is needed to exit?
What happens if you pass it without authority?
Enter:
1) Engineering Supervisor, or
2) Safe Work Leader
Exit:
PICOP (Person In Charge Of Possession)
Passing it without authority is a SPAD.
Describe a SPAD Indicator
Blue background
Black signal head with 3 lights
Top and bottom - flashing red
Middle - steady red with STOP written
SPAD Indicator
Where is it placed?
What must the driver do?
Who does this apply to?
around 50metres beyond certain signals
Stop Immediately
Contact the signaller
To the line its associated with and other lines
Where are banner repeaters provided?
What do banner repeaters do?
Provided before signals that are difficult to see.
e.g. curvature of the line, buildings and tunnels.
They give advanced information of the approaching signal.
Describe Banner Repeaters
( – ) The signal to which it applies is at Danger
( ̷ ) The signal to which it applies is a proceed aspect
( ̷ )
What is a Co-acting Signal?
Why are they provided?
A co-acting signal repeats the exact aspect or indication of the main signal.
To give both short and long distance sighting of the signal.
[OFF] indicator
Who is it used by?
What does it do?
Used by platform staff.
Shows [OFF] when signal is at Proceed,
which allows staff to then give CD and RA
Shows [ ] when signal is at danger
What can accompany an [OFF] indicator?
On a bi-directional line it can be accompanied by:
[UP]
[DN]
or any other indication to show which route has been set.
What is [CD], [RA] and [ R ]
[CD] is ‘Close Doors’
[RA] and [ R ] is ‘Right Away’
Whistle Boards
What is a Whistle Board?
What must a driver do?
Sign: (W)
It may be provided on the approach to some level crossings.
The driver must sound the horn continuously on the approach to the level crossing ahead.
What is a Preliminary Route Indicator?
What happens:
If arrow is pointing straight up?
If there is no arrow?
It shows an arrow pointing in the same direction as the approaching junction indicator.
Up arrow: There is no junction indicator set and junction signal shows proceed.
No arrow: Junction signal is at Danger - Stop!
Automatic Warning Signal (AWS) Cancelling Indicators
Describe the signs.
What does it inform the driver?
Where is it placed?
[X] Blue back, White cross
-Used with permanant AWS magnet
[X] Yellow back, Black cross
-Used with portable AWS magnet
The sign tells the driver that the warning indication does not apply to him.
Normally placed 180metres after passing AWS magnet
