18-07-2017, 12:50 PM
I may have misunderstood but surely Lime Street control is to manage permissive move[s]? On the Southern, when I live there, splitting and reforming was common- which equate to permissive moves. These must be inherent in the WTT. There are numerous places where freight can be stacked too.
Not sure signallers need to discuss permissive moves with a drivers. Driver's instructions are presented by aspect indications and route knowledge. PJW can correct me but a Y is a main route and suggests the route is clear to its exit. A sub would indicate a warner which would infer an occupied platform for an in service passenger train.
From memory, there is also an instruction for drivers to stop at a red lamp or short of any obstruction. This is one of the reasons buffer stops are not [rarely?] proved.
Reading about Lime Street control is actually an interesting feature to study and aid thinking for the exam..
Last point, if making statements about signaller requiring to speak to driver, quote that assumption in your answer. It may not comply with NR standards but then were should not using those in our answer anyhow but using first principles as the basis for our answer. Not all candidates will be from the UK or work on mainline!
Jerry
Not sure signallers need to discuss permissive moves with a drivers. Driver's instructions are presented by aspect indications and route knowledge. PJW can correct me but a Y is a main route and suggests the route is clear to its exit. A sub would indicate a warner which would infer an occupied platform for an in service passenger train.
From memory, there is also an instruction for drivers to stop at a red lamp or short of any obstruction. This is one of the reasons buffer stops are not [rarely?] proved.
Reading about Lime Street control is actually an interesting feature to study and aid thinking for the exam..
Last point, if making statements about signaller requiring to speak to driver, quote that assumption in your answer. It may not comply with NR standards but then were should not using those in our answer anyhow but using first principles as the basis for our answer. Not all candidates will be from the UK or work on mainline!
Jerry
Le coureur