Single Line Working Flashcards
When would single line working be introduced and what does this allow trains to do?
When one track of a double track uni-directional layout is blocked, SLW allows trains to travel in both directions over the unblocked line.
Who arranges SLW?
The pilot and the signaller. The signaller informs the pilot of arrangements.
What is SLW a form of?
Degraded working
How would you identify the pilot?
Red armlet with word ‘pilot’
How would you be made aware of SLW?
On the move or in the WON
How does the pilot protect the obstructed line?
With detonators placed 400m beyond the cross over to allow trains to draw forward and set back to access it. He also secures any points for the movement.
How many trains can travel over SLW in the normal direction? Which signals must be obeyed for trains travelling in the normal direction?
Normal amount of trains for the signalling system. All signals obeyed as normal
How many trains can travel over SLW in the wrong direction? Which signals must be obeyed for trains travelling in the wrong direction?
Only one train over the SLW section at one time. Signals to be disregarded.
How are movements back to the proper line controlled for trains travelling in the wrong direction?
By hand signallers unless there is a main aspect controlling movements back to the proper line or if the pilot travels with every train
Is a hand signaller still required to control movements back to the proper line in poor visibility?
Yes
Can position lights or shunting signals be used to control movements back to the proper line?
Yes but a hand signaller would still be required as these signals are not main aspects.
If there is no main aspect or hand signaller to control movements back to the proper line, what must happen?
Pilot must travel with trains in the wrong direction
If a pilot travels with the driver, what must they instruct the driver to do at the end of SLW?
Stop and contact the signaller for permission to re-join the proper line when opposite the signal protecting the cross over (TCB) or opposite the home signal controlled by the signal box that controls the cross over (AB).
If a train is due to enter SLW in either the right or wrong direction but there is no train to follow them, what must happen?
The pilot must accompany the driver.
What serves as your authority to enter SLW?
Possession of the completed RT3193 form and personal authority of the pilot.
Who issues the RT3193?
The pilot
What is a feature of the RT3193?
Double sided- right/wrong direction
What information is included on the RT3193?
Cross overs SLW is taking place between, affected lines, TSRs/ESRs, intermediate signal boxes that are closed, to approach points at caution and check if they are set correctly, to pass points at 15mph if they are unworked not clipped or scotched or if you are the first train, to pass points at 50mph if not the first train to pass, AHBC instructions to pass on authority of green hand signal only, hand signaller locations, level crossing arrangements, speeds, to pass any specific location only if authorised by a hand signal, whether a hand signaller or main aspect controls the cross over.
What must you do with your ticket when you reach the end of SLW?
Write ‘cancelled’ on it and return to pilot or fax at depot.
In what circumstances would you not receive an RT3193?
REAR or when working to and from a point of obstruction
What are your actions when passing a CCTV/OD/RC crossing during SLW?
No attendant- approach at caution, pass if safe
Attendant- cross if green hand signal shown
What are your actions when passing an AHBC during SLW?
No attendant & WD controls fitted- maintain speed on WD speed board from board until train on crossing
Under local control (if no WD controls)- only pass if green hand signal shown
What are your actions when passing a manually controlled crossing protected by signals?
Cross only if green hand signal shown
What are your actions when passing a manually controlled crossing where a hand signal is shown opposite the protecting signal?
Cross if yellow hand signal shown (acting as signal as next aspect unknown)
What are your actions when passing a controlled crossing protected by signals where the normal barrier position is closed to road traffic?
No hand signal. Only cross when certain crossing is closed to road traffic.
What are your actions when passing a R&G crossing during SLW?
Unless fitted with WD controls, stop short, sound horn and pass when safe
If WD controls, proceed at speed on speed board from board until on crossing.
What are your actions when passing a barrow or foot crossing during SLW?
Unless fitted with WD controls, approach at caution and pass when safe.
What must you do with the pilot before entering SLW?
Personally identify him, have his personal authority and a completed RT3193 to enter and reach a clear understanding.
At locations with a hand signaller, what must you do?
You must stop at all locations with a hand signaller unless a proceed hand signal is shown.
What speed can you travel at during SLW in the normal direction?
Line speed
What speed can you travel at during SLW in the wrong direction?
Max. 50mph or any lower speeds that apply
Which signals can be disregarded when travelling in the wrong direction?
All signals except those protecting cross overs.
When travelling through SLW, what must you do as per RT3193?
Follow any instructions on the ticket
If you are the first train into the SLW section, what speed can you do over points?
Max.15mph and subsequent trains can travel at max.50mph over points
If you are accompanied by the pilot and you are the first train into the SLW section, what must you allow him to do?
Stop and allow him to inform any personnel of SLW or to check points
If you are the first train into the SLW section but you are not accompanied by the pilot, what must you do?
Stop to inform any personnel of SLW.
If stopping opposite a signal protecting a cross over on a TCB line, what possible hand signals could you receive?
Red or yellow
If stopping opposite a home signal controlled by the same signal box as the cross over, what possible hand signals could you receive?
Red or yellow
If you are stopping opposite any signal where trains may be required to stop, what possible hand signals could you receive?
Red or yellow
If you are stopping at any intermediate signal box unless closed, what possible hand signals could you receive?
Red or yellow
If you are passing any unworked points when approaching in the facing direction, what possible hand signals could you receive?
Red or green next to the points at ground level.
When might working to and from an obstruction be implemented? Where is SLW introduced within this?
When both lines of a double track layout are blocked by an obstruction, SLW is introduced over one line only
Can SLW be introduced on both sides of the obstruction?
Yes but separate pilots will be required and must travel with every train.
Is a completed RT3193 required to enter a SLW section when working to and from a point of obstruction? Why?
No because the pilot must accompany every train
When working to and from a point of obstruction, does the pilot have to travel with you?
Yes, the pilot must travel with every train.
Can SLW be introduced on TCB lines where there is more than one available line? If so, what criteria must be met?
Yes:
1) Must be more than 2 running lines
2) All lines in one direction must be blocked
3) There must be two or more lines in the opposite direction that remain open.
Which line should trains travelling in the normal direction travel on when SLW is introduced at a location with more than one available line?
The unobstructed line that is not being used for single line working
Which line should trains travelling in the wrong direction travel on when SLW is introduced at a location with more than one available line?
Trains that cannot run in the normal direction due to the blockage must travel over the other available line that is being used for single line working.
If the pilot accompanies a train that subsequently fails, what can the driver ask the pilot to do?
To carry out emergency protection.
Who’s permission is required before making a movement to return to the same end of the single line that you entered from?
The signaller.
If a train fails and the pilot is not on the failed train, what must happen?
The pilot must travel on the assisting train if assistance is to come from the rear and the failed train is going to be withdrawn to the rear to return to the same end of the single line that it entered from.
