Signals, Handsignals, Indicators and Signs RS521 Flashcards
What is the name of this signal?
Junction indicators
Junction indicators are provided to show that a train is being signalled to a route to the left or right of the straight route.
A junction indicator is normally located above the signal, and will display a line of white lights when a proceed aspect is displayed.
What is the name of this signal?
Route indicators
At some locations a route indicator is provided at the signal. The indicator will display either a letter or a number to show the route onto which the movement is being signalled. Route indicators may also be associated with a junction indicator.
Flashing yellow aspects
What does a flashing yellow aspect indicate?
A flashing yellow aspect means facing points at a junction ahead are set for a diverging route with a lower speed than that for the straight route.
Three-aspect flashing yellow signalling
What colour aspect should you expect at signal number 5?
When a single steady yellow aspect is displayed together with a junction indicator at signal 4, this has the normal meaning of a yellow aspect, be prepared to stop at the next signal (number 5). This applies even though a flashing aspect may have been displayed at signal 3.
What is the name of this signal?
Position-light signals
Position-light signals that display a red aspect
These position-light signals are normally positioned at ground level independent of a main aspect. When proceeding on the authority of a main aspect, any position-light signals along the route between main running signals will show a proceed aspect.
These indicate STOP.
What is the significances of a position light signal which displays a yellow light.
What does this signal currently indicate?
Position-light shunting signals that display a yellow aspect are stop signals applying only to movements in the direction to which the signal can be cleared. Other movements can pass the signal without it being cleared. The previous signal indicated STOP.
The signal can be passed in the ‘stop’ position when a movement is being made towards the shunt neck or siding and not the running line.
What is the name of this signal?
Is it showing a Proceed or Stop aspect?
Position-light signals that display a proceed aspect
If a position-light signal displays two white lights at 45°, this authorises the driver to proceed at caution towards the next train, signal or buffer stop, and be prepared to stop short of any obstruction.
What is the name of this signal?
Position-light signals associated with a main aspect
These are normally positioned below the main aspect they are associated with, and often on the same signal post. The normal aspect for a position-light signal is unlit. This means ‘obey the main signal’.
What does this signal authorise you to do?
When the position-light signal shows two white lights at 45° it authorises the driver to proceed at caution towards the next train, signal or buffer stop, and be prepared to stop short of any obstruction.
What does this sign mean?
Position light signal that has an associated route indicator
Route indicators associated with position-light signals are of miniature design, and display a letter or a number that shows the route onto which the train is being signalled.
What does this image mean?
Colour light signals not in use
When not in use, main and position-light signals are covered up. Main aspects may also have a large ‘X’ displayed over the cover.
What does this signal mean and what indication is it giving?
Semaphore Distant signals
These signals show the following indications. Caution
- Indication by day: Arm horizontal.
- Indication by night: Yellow light or reflectorised indication.
Meaning: be prepared to stop at the next stop signal, or other specified place to which the distant signal applies
What is the name of this signal and what indication is it giving?
Semaphore Distant signal
Indication: Clear
- Indication by day: arm raised or lowered 45°.
- Indication by night: green light.
Meaning: all associated stop signals worked from the same signal box are clear.
If there is only one distant signal provided for a diverging junction, this signal applies to all trains that approach it
What does this signal mean and what indication is it giving?
Semaphore Stop signal
Indication: Danger
- Indication by day: arm horizontal.
- Indication by night: red light.
Meaning: STOP
What does this signal mean and what indiction is it giving?
Semaphore Stop signal
Indication: Clear
- Indication by day: arm raised or lowered 45°.
- Indication by night: green light.
- Meaning: proceed.
What does this image mean?
Semaphore signals not in use
When semaphore signals are not in use, they have:
- A large X fixed on the signal arm, or
- The disc covered over.
What is the name of this sign and what does it mean?
Limit of shunt signals or indicators
Limit of shunt signals or indicators Limit of shunt signals or indicators are either:
- instructions on illuminated signs, or
- two red lights horizontally displayed.
No part of the train may pass a limit of shunt signal or indicator unless authorised by the signaller.
If a limit of shunt signal or indicator is passed without authority, it is a signal passed at danger.
What is the name of this sign. And when may you proceed past it?
Stop Board
The driver or person controlling the movement may only proceed past the stop board when:
- The instructions on the stop board have been carried out,
- Permission to do so has been given by the authorised person.
If a stop board is passed without authority, it is a signal passed at danger.
What is the name of this sign?
Possession limit boards (PLB)
A PLB identifies the boundary of a possession. They may also be used as part of the protection for a line blockage. The board is red, double-sided and is visible along the line in both directions. It will also have a steady or flashing red light visible along the line in both directions.
If a PLB is passed without authority, it is a signal passed at danger.
What does this board mean?
Work-site marker boards
Work-site marker boards may be provided within a possession of a running line.
It has two red flashing lights which indicate an entrance to a work site. The authority of the Engineering Supervisor or Safe Work Leader is needed to pass it. It has two yellow flashing lights which indicate an exit from a work site. The authority of the PICOP is needed to pass it. Both indications are treated as a stop signal.
What is the name of this indicator. And where would it be provided?
Off’ indicators
If an ‘OFF’ indicator is provided at a platform, it will:
- show the word ‘OFF’ when the signal to which it applies shows a proceed aspect
- allow a guard or platform staff to check the signal is clear before commencing the train despatch procedure
- show no indication when the signal to which it applies is at danger. On a bi-directional platform line, the ‘OFF’ indication may be accompanied by an ‘UP’ or ‘DN’ or other indication to show which route has been set.
An ‘OFF’ indication does not always mean the line ahead is clear as the signal to which it applies may have been cleared for another train standing ahead in the same platform. ‘OFF’ indicators may be provided at locations other than platforms to show the driver that the signal to which they apply is displaying a proceed aspect.
What does this signal mean?
What does the top and bottom signals indicate
Banner repeating signals
Banner repeating signals are provided on the approach to certain signals which have restricted sighting (for example because of curvature of the line, buildings or tunnels), to give advance information of the signal aspect.
Position: On (TOP)
Meaning: the signal to which it applies is at danger.
Position: Off (Bottom)
Meaning: the signal to which it applies is displaying a proceed aspect.
What does this indicator mean?
‘Close-doors’ indicator
Close-doors indicators display the letters ‘CD’ when illuminated, and let the driver know that it is safe to close the power-operated doors on the train.
What does this indicator mean?
‘Right-away’ indicators
Right-away indicators display the letters ‘R’ or ‘RA’. If this indicator is illuminated, it tells the driver that station duties are complete, the train is secure and that it is safe to proceed.
What does this sign mean?
Rear clear marker
This sign informs the driver that the train has cleared a defined location to the rear.
What does this marker mean?
Mid-platform train berth marker
This sign informs the driver of the sub-divisions along a station platform to permit its use by more than one train.
What does this board mean?
Whistle boards
A whistle board may be provided on the approach to some level crossings. The whistle board can be a retro-reflective round sign or a cut out.
What does this indicator mean?
Automatic warning system (AWS) cancelling indicators
Where the AWS magnet is permanently installed.
On single and bi-directional lines, the AWS magnet will normally be suppressed for movements for which it does not apply, this means the AWS will not operate. However, there are some locations where the AWS magnet is not suppressed. In these cases a cancelling indicator is provided to tell the driver that the AWS warning indication does not apply to trains travelling
What does this indicator mean?
Automatic warning system (AWS) cancelling indicators
Where the AWS magnet is provided in connection with a temporary or emergency speed restriction on a single or bi-directional line.
On single and bi-directional lines, the AWS magnet will normally be suppressed for movements for which it does not apply, this means the AWS will not operate. However, there are some locations where the AWS magnet is not suppressed. In these cases a cancelling indicator is provided to tell the driver that the AWS warning indication does not apply to trains travelling