Safeworking 17 - 20

Question 1

When will Absolute Block Working be implemented? (3)

Answer 1

• Track maintenance machines are required to pass through a section
• Rail traffic movement fails to be detected by the signal control system
• Any other circumstance as necessary (e.g. a bat flies into infrastructure and wipes out a whole section of signals)

Question 2

What is the object of Absolute Block Working?

Answer 2

• Ensure only one train is in a defined section of track at any time

Question 3

How will the object of Absolute Block Working be achieved?

Answer 3

Once a train has entered the section, the signaller sleeves the signal at Stop, and the blocking command can only be removed once the train has arrived complete at the end of the Absolute Block point

Question 4

What are the two types/areas of Absolute Block Working?

Answer 4

• Between two adjacent controlled signalled locations
• Between a controlled absolute signal and a nominated clearance point

Question 5

What classes of signals are considered to be absolute?

Answer 5

Home, Dwarf or Disc signal that are operated by a signaller and can be secured at Stop

Question 6

How will Absolute Block Working be implemented on a Single Line section?

Answer 6

Prior to departure of a train into the Block Section, the opposing departure signal must be sleeved at stop. Once the train has arrived complete, the blocking facilities can be removed

Question 7

What will happen if the train detection system fails under Absolute Block Working?

(i.e. they lose the train)

Answer 7

Everyone will poop themselves a little bit.

Signaller will ensure any controlled signals are at Stop

Train Controller will issue a REC and try to contact driver.

Driver (if able to be contacted) will be instructed to Extreme Caution it until train can be tucked away for testing

Question 8

How can the driver monitor the condition of the train in running?

Answer 8

• Rear facing mirrors
• Body side cameras with in-cab CCTV
• Platform mounted mirrors and CCTV

Question 9

When can a driver monitor the condition on the train in running?

Answer 9

When it is safe to do so

Question 10

What are the four types of inspection that can be conducted in running?

Answer 10

• Front of train
• Side of train
• Platform departure
• Roll-by

Question 11

What exceptions are there to pass a red hand signal at Stop?

Answer 11

None

Question 12

What are the two things Gary said we need to remember from the Train Following Safely?

Answer 12

• Long, straight sections of track
• Big, sweeping curves

Question 13

Who manages the overhead system?

Answer 13

Electrol

Question 14

With loss of overhead power, how many times will Electrol try and reset the power supply?

Answer 14

Twice

Question 15

What are the three types of section insulators?

Answer 15

• Fibreglass
• Porcelain
• Wood

Question 16

The locations of the Tramway crossings are:

Answer 16

• Glenhuntley (Glenhuntley Rd)
• Riversdale (Riversdale Rd)
• Kooyong (Glenferrie Rd)

Question 17

What is our authority to pass a home signal at stop when at a Tramway Square?

Answer 17

Signaller’s Caution Order

Question 18

What does CBTC stand for?

Answer 18

Communication Based Train Control

Question 19

What is the object of CBTC?

Answer 19

To enforce the continuous safe separation of trains, and to provide over-speed protection of trains

Question 20

What is the area of CBTC?

Answer 20

Down: South Yarra Platform 5 and 6 to Clayton Platform 2

Up: Clayton Platform 1 to South Yarra Platform 5

Question 21

Learn all those CBTC signs. There’s 4 of them.

Answer 21

Okay

Question 22

What types of signalling are available in the CBTC area? (2)

Answer 22

• Fixed Block Signalling (conventional)
• Moving Block Signalling

Question 23

What happens if a driver encounters a signal irregularity inside Mixed Mode Territory?

Answer 23

Contact Train Controller

Question 24

What authority does a driver need to pass an irregular signal or block marker inside Mixed Mode Territory?

Who can issue it?

Answer 24

Alternative Proceed Authority, issued by controlling signaller at Sunshine Signal Control Centre

Question 25

What speed can movements take when conducted under an Alternative Proceed Authority?

Answer 25

Extreme Caution

Question 26

An APA can only authorise a train movement to the: (5)

Answer 26

• Next Fixed Signal
• Next CBTC Block Marker Board
• Disabled Train
• Buffer Light
• Station

Question 27

What are the 6 Cs of CBTC rescue?

Answer 27

• Confer
• CBTC Isolate (HCS switch)
• Couple
• Cancel
• Continuity
• Contact

Question 28

How is a disabled train running on CBTC protected?

Answer 28

From the rear cab, with rear marker lights on red

Question 29

When is an APA cancelled? (2)

Answer 29

• The move is unable to be completed
• The Signaller has been assured the movement has not started

Question 30

When is an APA fulfilled?

Answer 30

When the move is completed

Question 31

Under what circumstances would a driver receive an Alternative Proceed Authority?

Answer 31

When the signalling system cannot provide a Proceed, due to malfunction or irregularity (within mixed mode signalling parameters)

Question 32

An APA can only authorise a train movement to the: (5)

Answer 32

• Next fixed signal
• Next CBTC block marker board
• Disabled train
• Buffer light
• Platform

Question 33

APAs must only be issued: (5)

Answer 33

• To one train at a time
• Via a recorded line
• In accordance with Safety Critical procedure
• When the affected train is stationary
• Assisting a disabled train