Automatic And Track Control

Question 1

What is the object of the A.T.C. safe working system?

Answer 1

the object is to prevent more than one train being on a track section at the same time.

When trains are to proceed in opposing directions through the single line section, the object is to prevent more than one train entering the single line section at the same time.

Question 2

How are the opposing train movements prevented?

Answer 2

Once a departure signal has been placed to proceed for the single line section, the opposing departure signal is electronically secured at stop until the section is clear.

Question 3

What two types of crossing loops are there?

Answer 3

• locally controlled crossing loop
• remote controlled crossing loop

Question 4

What signals are in use at crossing loops?

Answer 4

Home arrival signals

Question 5

What is the Station Limits on the A.T.C. system defined as?

Answer 5

The portion of line between opposing home arrival signals

Question 6

When can a Low-Speed Caution be fitted to a Home Departure signal?

Answer 6

If it moves you into a siding or a low speed movement towards another line which is not worked under ATC rules.

Question 7

What is a single line section?

Answer 7

The portion of line between two crossing loops.