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Bletchley 3 > DT4 - LU Handout > Flashcards

DT4 - LU Handout Flashcards

1
Q

Who has responsibility for service regulation on the LU

A

Hammersmith Controller

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2
Q

How are the lines referred to?

A
  • northbound
  • southbound
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3
Q

How are automatic signals identified?

A

Prefix ‘A’ followed by signal number

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4
Q

What are the two types of signal on LU?

A
  • controlled
  • automatic
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5
Q

What are the signal plate abbreviations for controlled signals?

A
  • JW: Amersham
  • JP: Rickmansworth
  • JJ: Watford Junction
  • JB: Harrow on the Hill
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6
Q

What are the two states of fog repeaters?

A
  • Yellow aspect: the associated signal is at danger
  • White aspect: the associated signal is clear or at caution

Permanently either one or the other

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7
Q

How far in advance are fog repeater signals located?

A

400ft of the associated signal.

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8
Q

What is the purpose of tripcock testers?

A

To check that the tripcock of each passing train is in the correct position to contact a raised trainstop.

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9
Q

How fast should you approach a tripcock tester?

A

10mph

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10
Q

What should you do if the test indicator light is extinguished and the train is not tripped?

A

Test is passed, continue as signalled

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11
Q

If the test indicator light is extinguished but the train is tripped, what should you do?

A
  • Can remain in service as test is passed
  • driver must contact Hammersmith Control/Controlling Signaller for further instructions
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12
Q

What should you do if the indicator light remains illuminated?

A
  • Test has failed
  • Driver must contact Hammersmith Control/Controlling Signaller for further instructions
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13
Q

If a signal is at danger, what does the trainstop do?

A

Arm raises to activate tripcock on any passing train.

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14
Q

What happens after a tripcock activation?

A

Emergency brake application and steady red light shown on indicator panel

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15
Q

How do you reset the tripcock?

A
  • direction controller to neutral
  • pressing uncouple button for ~10s
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16
Q

Regardless of location, what must you do after a tripcock activation?

A
  • Stop
  • Secure the train
  • Contact the signaller and inform them of the circumstances
  • Do not move the train until given authority to do so.
17
Q

What do you do if a signal shows both green and red aspects simultaneously?

A

Treat signal as being at danger

18
Q

If a gap indicator had 3 red lights displayed, what must you do?

A
  • stop before the indicator if possible and inform the LUL controller
  • if unable to stop before hand, stop when possible and contact the controller.
    You will be advised to proceed at caution to next station, giving regular short blasts of the horn.
19
Q

When can the horn be sounded on LU?

A

0700 - 1900

20
Q

What does a category A platform mean?

A
  • driver unable to see whole of PTI from the cab without the use of mirrors or monitors
  • must inform LU controller if the mirror/monitors become defective and get assistance with dispatch
21
Q

What does a category B platform mean?

A
  • driver can see whole PTI by looking back from the cab
  • if the mirrors/monitors become defective you must inform station staff or Hammersmith controller.
22
Q

What is the dispatch procedure for a B platform with defective mirrors/monitors?

A
  • check station starting signal is clear
  • check customers are clear of operational doors
  • close doors and check they are closed safely
  • check PTI again
  • check signal again and then PTI again
  • start your train
23
Q

Where are LU TSRs published?

A

LU Traffic Circular

24
Q

What warning do you receive of an approaching TSR?

A

Flashing signage in the 4’ 50m ahead of commencement board

25
Q

What happens if the TSR is 15mph?

A

Yellow light/flag at commencement with a green light/flag at termination point

26
Q

Who must authorise any deviation from the rules?

A

Senior Operating Officer

27
Q

If your at an automatic signal showing a danger aspect, that is not a platform starting signal, under what conditions can you pass it under your own authority?

A
  • If the signaller/LU controller cannot be contacted
  • 2 minutes have elapsed since you first tried to contact
28
Q

After passing a signal at danger, when can you continue at line speed?

A

After passing two successive signals showing proceed aspects

29
Q

Who can relay movement instructions to the driver?

A
  • Controllers
  • Station Supervisors
  • Duty Managers
30
Q

How far can a signaller give authority to set back?

A

1 car length

Bletchley 3 (13 decks)

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