Module PoSA

Question 1

Proceed on sight authority
A PoSA is a signal aspect which can be associated with a stop signal. When it displays 2 flashing white lights at 45 degrees it means?

Answer 1

The signal or signalling equipment has failed
The points are in the correct position for the train
The driver is authorised to proceed at caution
The driver must obey other signals or indications on the driver machine interface (dmi)

Question 2

Proceed on Sight Authority

If the PoSA is unlit what does it mean ?

Answer 2

Obey the main aspect that is displayed at that signal

Question 3

Observing and obeying PoSA signals
Train stopped or nearly stopped at a signal at danger
If stopped at a signal at danger and a PoSA is displayed what does it mean?

Answer 3

You may proceed past the signal even though the main aspect is at danger or unlit

Question 4

Observing and obeying PoSA signals
If you see anything wrong at the PoSA signal
What failures of a PoSA should you report and who to?
What form should you complete?

Answer 4

Signaller 
Report if
Only one light is showing
Both lights unlit
A route indicator is not displayed when one should be 
Complete a RT3185 form

Question 5

Observing and obeying PoSA signals

If given authority by a PoSA to proceed at what speed should you travel?

Answer 5

At caution.

Be prepared to stop af next signal, buffer stop or obstruction.

Question 6

Observing and obeying PoSA signals
If given authority by a PoSA to proceed and there is a level crossing in the section.
can you pass over it?

Answer 6

Only when you are sure it is safe to do so
You must it is safe before passing over any of the following level crossings that the signaller has told you will not operate normally for the movement
Automatic level crossing
A narrow or foot crossing with white light indicators
A crossing equipped with minature warning lights

Question 7

Observing and obeying PoSA signals

If given authority by a PoSA to proceed into a station or platform should you set DRA?

Answer 7

Yes. Only reset when
Platform starting signal shows a proceed aspect
Platform starting signal and you have been given authority to pass it at danger
You have authority to start the train where there is no starting signal