Signalling

Question 1

What is the principle of Absolute Block signalling?

Answer 1

One train, One section, One time

Question 2

What does it mean for a signal to be showing as “off”?

Answer 2

Showing permission to proceed

Question 3

How do you identify a distant semaphore

Answer 3

Yellow with a fishtail and black chevron

Question 4

How do you identify a Stop semaphore

Answer 4

Red with a white stripe

Question 5

What does a raised semaphore mean?

Answer 5

Proceed/off

Question 6

What does the home signal signify

Answer 6

The beginning of station limits

Question 7

What does a Section semaphore signify?

Answer 7

The beginning of a block section

Question 8

What is the area between a distant and home signal known as?

Answer 8

Service Braking Distance

Question 9

You see a black and white semaphore; what does that mean?

Answer 9

Its the back of a semaphore, coloured different so as to not confuse

Question 10

How long is the Clearing Point?

Answer 10

Around 400 metres

Question 11

What does a white diamond shaped sign on a signal post mean?

Answer 11

The area is track circuited

Question 12

What does a white diamond shaped sign with a T on a signal post mean?

Answer 12

The area is track circuited and there is a telephone here

Question 13

What does IBH stand for and what is it?

Answer 13

Intermediate Block Home signal

Its an extra stop signal provided on long stretches of track

Question 14

What sign signifies an IBH signal?

Answer 14

White rectangle with a vertical black line doen middle

Question 15

Theres a signal with a black sign with a white triangle in it in an Absolute Block area; what does it mean?

Answer 15

Its an intermediate block distance signal

Question 16

Who controls the IBH signal?

Answer 16

The signaller at the rear

Question 17

Where woupd you find a fixed distant signal?

Answer 17

At a location such as dead ends or loops where the next signal will always show ‘caution’

Question 18

How do you identify a subsidiary signal?

Answer 18

Its a smaller semaphore or light signal located below a full size signal

Question 19

A subsidiary signal is raised and showing a C; what does this mean?

Answer 19

“Calling On”

Train can proceed at caution as the line ahead is likely occupied, such as a station platform where more than one train is allowed in the section

Question 20

A subsidiary semaphore is raised and showing an ‘S’ what does this mean?

Answer 20

Shunt

Proceed at caution and carry out your shunt manoeuvre, only going as far as necessary

Question 21

How to read Stepped Semaphore signals

Answer 21

Highest signal refers to the main route

Lower signals relate to the routes to the left or right of the main route

Question 22

How to read Stacked semaphore signals

Answer 22

Highest signal refers to the route furthest left

Lower signals relate to progressive routes to the right