Signalling: RS521 Flashcards
What Type of Signal does this sign indicate?
and
What is its definition?
Controlled Signal
A signal operated by the controller,
some of which may be set by the signaller to work automatically.
What Type of Signal does this sign indicate?
and
What is its definition?
A signal operated by the the passage of trains by making use of the track circuit.
On some occasions the signaller and a person operating a signal post replacement switch can place the signal to danger.
What Type of Signal does this sign indicate?
and
What is its definition?
Semi Automatic Signal
Usually operated by the passge of trains by use of the track circuit. However it can be operated by the siganller from a signal box or groundframe. Also by a person operating a signal post replacement switch.
What Type of Signal does this sign indicate?
and
What is its definition?
Controlled Distant Signal
Controlled: controlled by signaller from signal box or groundframe
Distant: cannot show a stop aspect. Identified by a white diamond or R symbol.
What Type of Signal does this sign indicate?
and
What is its definition?
Outer Distant Signal
Distinguished by the RR
What Type of Signal does this sign indicate?
and
What is its definition?
Controlled Banner Repeater Signal
Banner repeater signals are provided on the approach to certain signals which have restricted sighting (for example because of curvature of the line, buildings, overbridges or tunnels), to give advance information of the signal aspect. Their meanings are. Banner on: The signal to which it applies is at danger.
What Type of Signal does this sign indicate?
and
What is its definition?
Co-acting signal
A second signal head close to the main one that displays the same aspects. They are provided when the main apsect has sighting issues.
What Type of Signal does this sign indicate?
and
What is its definition?
Intermediate Block Signal
A signal that controls the exit from an intermediate block section, and the entrance to an absolute block section or another intermediate block section.
What could be the normal sequence of signals for a three aspect signal system when being stopped?
- Green [Proceed]
- Single Yellow [Caution]
- Red [Stop]
What could be the normal sequence of signals for a four aspect signal system when being stopped?
- Green [Proceed]
- Double Yellow [Preliminary Caution]
- Single Yellow [Caution]
- Red [Stop]
What is the purpose of a junction indicator and what does it show?
Junction indicators are provided to show if a train is being signalled on a route to the left or right of the striaght route.
Normally located above the signal and will display a line of white lights when a proceed aspect is displayed.
At a junction with junction indicators will the straight ahead route have a junction indicator?
Generally No.
However, if the straight ahead route is not obvious, a junction indicator will be provided for the straight ahead route.
What is a route indicator?
A route indicator is provided at a signal and shows the route the trina is cleared on. They can show letters or numbers and can be with junction indicators. Also known as theatre box.
What does a flashing yellow aspect mean?
Facing points at a junction ahead are set for a diverging route with a lower speed than the straight route.
What is the normal signal sequence of aspects when approaching a diverging junction onto a slower diverging route in a three aspect signalling system?
- Green
- Flashing Yellow
- Solid yellow with Junction indicator
- Red after junction
The solid yellow at the junction with the junction indicator means expect red next.
What is the normal signal sequence of aspects when approahcing a diverging junction onto a slower diverging route in a four aspect signalling system?
- Green
- Flashing Two Yellows
- Flashing Single Yellow
- Solid Yellow with junction indicator
- Red after junction
What is a splitting distant signal?
I dont know, i need to do this one.
What is the purpose of Position Lights?
Position light signals allow a train to move into a section under caution, the line ahead may be occupied so the driver must drive at caution towards the next train, signal or buffer stop, and be prepared to stop short of any obstruction.
What are the two types of positon lights?
1. Associated Position Lights: Normally positioned with a main aspect signal, the normal apsect is unlit and this means obey main signal.
2. Ground Position Lights: Normally positioned at ground level independant of a main aspect. When proceeding on the authority of a main aspect all position lights in that section will show a proceed aspect.
What does a ground position light showing red/red or red/white mean?
Stop
[note: when proceeding on the auhority of a main aspect, any ground position light signals along the route between the main running signals will show a proceed aspect]
What does a ground position light showing yellow/white or yellow/yellow mean?
[Also known as a position light shunt signal]
Position light shunt signal: This is a STOP signal with regards to the main line to which it applies.
Other movements can pass this signal without it being cleared when a movement is being made towards the shunt neck or siding and not the running line.
What does a ground position light showing white/white at 45 degrees mean?
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 does this Associated Position Light indicate?
- The driver is authorised to pass the main signal at danger,
- proceed at caution towards the next train, signal or buffer stop, and
- be prepared to stop short of any obstruction
Identitfy this sign set up and what it means?
Position Light with route indicator.
Displays letters and numbers and shows the route the trian is being signalled onto.
When a main apsect is not in use how will this be shown at the signal?
and
When a posiiton light is not in use how will this be shown at the signal?
Main Aspect: Bagged to prevent light seepage and a white/black cross over it
Position Light: Bagged to prevent light seepage
What is a Distant Signal?
A distant signal is one that cannot display a ‘danger’ aspect. However, it is able to display a ‘caution’ aspect, which gives the driver advance warning that the stop signal ahead may be displaying ‘danger’
What is this signal and what does it mean in this position?
Semaphore Distant Signal; Caution position
Proceed at caution, be prepared to stop at the next stop signal, or other specified place to which it applies
What is this signal and what does it mean in this position?
Semiphore Distant Signal at CLEAR
All the associated stop signals worked from the same signal box are clear.
What is this signal and what does it mean in this position?
Semaphore Stop Signal at Danger
STOP
What is this signal and what does it mean in this position?
Semaphore stop signal at clear.
PROCEED
When a stop semaphore signal and a distant signal ar positioned on the same post, who controls which?
The stop signal is worked by the signal box at that location,
and
the Distant Signal is worked by the signal box ahead
What does this miniature semaphore stop signal mean?
The miniature semaphore stop signal [semaphore shunt signal] controls movement into a loop, siding, or no block line. [not associated witht he main signal]
It means proceed at caution and be prepared to stop short of any train,vehicle or obstruction.
How is route indication carried out with semaphore signals [3 items]
- Stepping
- Stacking
- A Route indicators
Sempahore signals can indicate routes one of three ways, what is this method called?
Stepping
Sempahore signals can indicate routes one of three ways, what is this method called?
Stacking
Sempahore signals can indicate routes one of three ways, what is this method called?
Route indicator
What is this smaller semaphore arm signal called and waht does it mean in this position?
Semaphore Subsidiary Signal.
It is in the normal positon and indicate OBEY MAIN SIGNAL
What is this smaller semaphore arm signal called and what does it mean in this position?
Semaphore Subsidiary Signal. [always associated with the main aspect]
In the CLEARED TO PROCEED position and means you ar cleared to proceed past the main signal at danger to proceed towards the next train, signal or buffer stop and be prepared to stop short of any obstruction.
[same as an associated position light displaying two diagonal white lights, see image]
Name this signal set up and what does this mean in this position?
Semaphore Subsidiary Signal. [alway associated with the main signal]
Cleared to proceed at caution past the mian signal at danger. The C denotes for what purpose.
C means: call on, proceed at caution towards the next train, signal or buffer stop and be prepared to stop short of any obstruction.
Name this signal set up and what does this mean in this position?
Semaphore Subsidiary Signal. [alway associated with the main signal]
Cleared to proceed at caution past the main signal at danger. S denotes for what purpose.
S means; for shunting purposes only
Name these signals and what do they mean in this position?
Semaphore Shunt Signals.
Danger, STOP
Name these signals and what do they mean in this position?
Semaphore Shunt Signals.
PROCEED: proceed at caution as far as the line is clear.
Name these signals and what do they mean in this position?
Semaphore Shunt Signals.
STOP with relation to the mainline or line it is pertaining to.
Proceed with caution when the movement is being made towards the shunt neck or siding and not the running line.
Name these signals and what do they mean in this position?
Semaphore Shunt SIgnal.
Proceed at caution for as long as the line is clear.
Name the signs and what this set us is showing us?
Semaphore Shunt Signals / Stacked Route indicators
Which line does the sempahore shunt signal number 1 apply to?
The track on the far left.
When a Semaphore Signal is not in use how will this be displayed?
- A large X fitted on the signal arm
- The disc covered up
What are these signs called and what are their purpose?
Block Marker [ERTMS boards]
When a train is fitted with ERTMS a signal which would otherwise be displaying a red can display a Caution and a MA [Movement Authority] can be issued allowing the train into a section up to the block marker.
Name these signs and what do they mean?
ERTMS CAB Signalling Boards
Top: Warning of start of cab signalling ahead
Middle: Start of ERTMS cab signalling
Bottom: End of ERTMS cab Signalling
Name this sign and what does it mean?
ERTMS shunt entry sign
whena train is equiped with ERTMS this shows the entry point to a shunt route.
Name this sign and what does it mean?
Limit of shunt signal and sign
No part of the train may pass this sign unless authorised by the signaller.
It is a SPAD
What is this sign and what does it mean?
STOP BOARD
Your driver may only proceed past this sign when:
- instructions on the stop board permit it, or
- permission by the peron in charge has been given
pass without authority is a SPAD
where are they likely found: Dont know
What is this sign and what does it mean?
Possession Limit Board [PLB]
Defines the boundary of a possession or used as part of a protection for a line blockage.
Double sideded and has steady or flashing red light in both directions
SPAD if passeed without authority!
What is this sign and what does it mean?
Work Site Marker Board
- found within the boundaries of a posession after the Possession Limit Board
- Red flashing lights on entrance means STOP
- Yellow flashing on exit means STOP
- Need authority of PICOP to pass it person in charge of possession
- SPAD if passed wihtout authority
What is this sign and what does it mean?
SPAD Indicator
- Normally positoned 50m beyond certain signals
- If lights up it means you have gone through a red light you plonker and you need to stop the train immediatly and contact the signaller, becasue your in trouble.
What is this sign and what does it mean?
Points Indicator Signal
Often found at hydro-pneumatic points or some other points and tells you if the points are set corectly or failed to engage fully.
- When red or unlit means STOP and contact signaller
- When yellow means the points that is applies to are fitting correctly
SPAD if passed wihtout authority
What are these signs and what do their positons mean?
Banner Repeater: Distant Signal
Banner repeater signals are provided on the approach to certain signals which have restricted sighting, eg curve, bridge, buildings, trees
Top: The signal that this applies to is showing Caution
Bottom: The signal that this apples to is showing clear
What are these signs and what do their positons mean?
Banner Reapeater Signals:
Banner repeater signals are provided on the approach to certain signals which have restricted sighting, eg curves, bridges, buildings, trees
Top: The signal that it relates to is showing Danger
Middle: The signal that it applies ot is showing Proceed
Bottom: The signal that it applies ot is showing a green apsect.
What are these signals and what do they boht mean?
Banner Reapeater Signals Stepped
Banner repeater signals are provided on the approach to certain signals which have restricted sighting, eg curves, bridges, buildings, trees
Left Signal: The signal that the signal relates to is at danger
Right Signal: The signal that the sign relates to on the diverging right track is showing proceed
What is a co-acting Signal?
- Co-acting signals are provided to give both a short and long distance sighting of a signal where the main signal has sighting issues
- Repeats the exact same signal as the main signal
- They will be the same type and colour as the main signal
What is this sign and what does it mean?
OFF Indicator
Provided at a platform when the signal to which it applies has sighting issues and assist platform staff.
- Shows OFF when signal it applies to is clear, no sign when at danger
- Helps platform staff cofirm signal is off before commencing train dispatch procedure
- May also be accompanied with a route indicator
What sign often found at platforms helps station staff check the signal is clear before commencing train dispatch procedure?
OFF indicator
What will an OFF indicator display when the signal it relates to is at danger?
Nothing, it will not display anything.
At a platform what sign [if installed] will illuminate to let the driver know it is safe to close the power operated doors?
Close Door [CD] Indicator
At a platform what sign [if installed] will illuminate to let the driver know station duties are complete and it is safe to proceed?
Right Away Sign [RA Sign]
Either R or RA will display.
What is this sign called and what does it mean?
Rear Clear Marker
Tells the driver that when you reach this sign your rear is clear of a defined location.
What does a Rear Clear Marker sign look like?
Round white sign with black pyramid
What is this sign and what does it mean?
Mid Platform Birth Marker
Informs the driver of a subdivision along a platform to permit its use by more than one train.
What times of the day CAN you blow the whistle at a whistle board?
and
exceptions to this?
Between 06.00 -23.59
Exceptions: in an emergency or any other time the driver deems it neccasary in the interest of safety.
What tone should you select when blowing the whistle at a whistle board?
Low Tone