Week 9 - Temporary Block Working

Question 1

For what reason would TBW be introduced?

Answer 1

If there is a failure or disconnection of signalling equipment on a TCB line other than a single line and it is necessary to authorise the driver to pass at danger two or more consecutive main running signals under the same authority

Question 2

Who is in charge of the arrangements for introducing TBW? (S5 Reg 6.1)

Answer 2

Competent person (appointed by Area Op’s Manager)

Question 3

What locations will a TBW apply between? (S5 Reg 6.2)

Answer 3

• Signal kept at danger on the approach to the affected area

- Signal beyond the affected area that can be replaced to danger from the signal box

Question 4

What arrangements are necessary for points within a TBW section? (S5 Reg 6.2)

Answer 4

All points within the TBW section should be secured by clip, scotch and padlock, or by other authorised means

Question 5

When using TBW, what must you ensure when it is necessary to move points within the area affected by the failure or disconnection? (S5 Reg 6.2)

Answer 5

• You must make sure that two TBW sections are established
• The first ending at a stop signal on the approach to those points
• The second starting at a stop signal beyond those points

Question 6

Where is it necessary to position handsignallers in a TBW section? (S5 Reg 6.2)

Answer 6

At the entrance and exit signals of a TBW section

Question 7

What must you ensure before introducing TBW? (S5 Reg 6)

Answer 7

• All points secured in the correct position
• Necessary arrangements have been made at level crossings
• All trapped trains have cleared the affected area
• Necessary signals have been replaced to danger
• Handsignallers are at the necessary signals
• You have permission from the competent person

Question 8

What must you ensure before allowing a train to enter the TBW section? (S5 Reg 6)

Answer 8

• Route has been set throughout the TBW section (using route card if provided)
• The TBW ticket carried by the driver of the previous train has been received by the handsignaller at the end of the section
• The line is clear up to and including 200m (220yds) beyond the exit signal

Question 9

When does a driver not require a ticket when entering a TBW section? (S5 Reg 6.5)

Answer 9

When the train is entering the section to:

• Remove the rear portion of a divided train
• Evacuate passengers from a failed train
• Assist a failed train
• Remove a train or vehicles that have proceeded without authority