Ground Frames

Question 1

Before you give release for a ground frame, you must reach a clear understanding with the ground frame operator about what?

Answer 1

Movement to be made

Whether or not the train is to be shut in

Question 2

You must not allow a train to be shut in at an intermediate sidings for other trains to pass, unless __________?

Answer 2

The line is signalled by TCB or ERTMS

Authority is given in the SBSI (Signal box Special Instructions)

Question 3

If you are going to shut a train into a sidings, before you return the ground frame release to ‘Normal’, what must the ground frame operator tell you?

Answer 3

That the train is clear of the running line.

Question 4

You must not release the Ground Frame for a movement from the siding to the running line until all Track Circuits are clear….to where?

Answer 4

between the protecting signal (or block marker) for the running line and the points to be released.

to the next main running signal (or block marker) on the line to which the movement is to be made (unless your SBSI’s permit movement into an occupied line).

Question 5

If a movement will be from one running line to another running line, or across a running line, when do you release the Ground Frame?

Answer 5

when the line is clear between the protecting signal (or block marker) and the points to be released, on ALL affected lines.

Question 6

What must you do if you lose detection after the Ground Frame has already been relocked?

Answer 6

At the Ground Frame itself:

check levers/switches are locked in the Normal position,
check the indicators (if provided) are showing Normal detection.

Question 7

If, after checking at a Ground Frame, that the levers/switches are at Normal position and any indicators are showing normal detection - you find that they are NOT, what must you do?

Answer 7

Ensure that they are secured in the normal position (and padlocked, if left unattended)

Question 8

If you have had to have Ground Frame’s points secured and padlocked in the normal position due to a fault, how must you signal traffic past the protecting signal?

Answer 8

You must treat the signal on approach to the Ground Frame as defective and and instruct each train to pass it at Danger.