Examination of the line Flashcards
GERT8000
What three methods can be used to examine the line?
You can see the line is safe for trains to pass.
You can get a competent person to check the line is safe for trains to pass.
You can get the driver of a train passing over the affected area to check the line is safe for trains to pass.
When can you NOT use a train to examine the line? (7 answers)
F - Fishplates broken (more than a single plate).
U - Underline bridge struck by road vehicle (unless otherwise
stated in SBSI).
S - Subsidence.
E - Earthworks/Landslips have been reported to be affected.
D - Damage to bridge not caused by road vehicle.
B - Broken, damaged or distorted rail.
O - Other structures above or below the rail.
What must you ensure with regards to the last train to enter the affected section, before you allow a train to examine the line?
That it has passed (C.W.T.L.) beyond the stop signal (or block marker) ahead of the affected portion of the line.
Unless a portable head light has been fitted, when must you NOT use a train with a failed headlight to examine the line?
During hours of darkness, poor visibility or through a tunnel.
If there is more than one line in the affected area, how must you treat each line until it has been examined?
As though each line is affected, until you have confirmation that a line is not affected.
Each line must be examined individually, but can be examined simultaneously.
Where the affected line is in a tunnel, can you allow a 2nd train to enter or pass the tunnel while another train is examining the affected line?
No.
When an affected line is being examined, you may allow other lines not affected to continue to run. However, what must drivers of immediately adjacent lines be told?
What is happening,
the locations between which the adjacent line is affected,
to pass this affected portion at caution,
to report as soon as possible is anything is seen to be wrong.
What must you tell the driver of the train used to examine the line, before they do so?
Why the line is to be examined,
reach a clear understanding with them about which portion of the line is to be examined,
when the signal is cleared (or authority given to pass it at danger), proceed at caution over the affected portion of line,
if the affected line is in a tunnel, go no faster than 10MPH through it,
if examined due to track defect, go no faster than 20MPH over it,
report back to the signaller at an agreed point beyond the affected portion of line.
Where 6 bells (obstruction danger) has previously been sent, what bell code must the signaller accepting the examining train, send?
2-1-2 (Obstruction Removed).
If the examining train cannot proceed beyond the affected line and needs to return towards the section it entered, which regulation should you follow?
Wrong-Direction Movement (TW7).
If the examining train has had to return on the same line back towards you due to obstruction, etc - when should you send 3-5 (train cancelled) to the box in advance?
When the train is clear of the section concerned.
If a line has been examined and a reportable fault has been found, what must you tell the driver of every train to pass over the affected area?
A track defect has been reported,
Proceed at caution over the affected area no faster than 20MPH.
If a track circuit shows occupied after the passage of a train, but then clears intermittently, once you have reported this to Ops Control (but before a signalling technician has arrived), when can you resume normal working?
Rule of 3:
At least 3 trains have passed the affected track circuit,
that track circuit has been observed to operate normally for (and in-between) each of those passing trains.
