Sorry to reply you so late because I have reviewed the Study Pack and related materials carefully for better interpretation. Anyway, first of all, thank you a lot for your careful answer. I read your state comparing with the Study Pack, and has some confusions again:
In Study Pack AppendixW Activity1C: at last part of stopping headway calculation for Up Main, it says "To achieve the stopping headway, this signal would also have to be the first cautionary aspect, and hence 3 aspect signalling is appropriate(at least in the station area)". But I did not find any hint about why choosing 3 aspcet signal.
And 59s is for the train from 1st cautionary signal to stop signal, but I think it should also contain the constant speed section from the green signal to 1st yellow signal. Where is my error? In other years' stopping headway calculation, the headway usually contains 5 time section, but this only contains 4. So I am very confused why does this not contain the constant speed section...
Non-stopping calculation also uses 3min headway, but the required haedway is "Main Lines: following stopping at 80km/h"--I think it refers to stopping headway only. I am confused about why you take non-stopping and stopping headway both as 3min? I know, this situation is uncommon in other years' exams, which always have different headway for non-stopping and stopping.
Also in study Pack AppendixW Activity1C, Approach to Platform5(Up Main): it says an allowance of 111s for the time between Green and Red, and time taken to traverse the 40kph section is 35s, reducing from 80kph to 40kph is 22s, so leaves 54s at a constant speed. But I think it also should minus 12s sighting time...
I do not have much experience in railway work, so most of knowledge comes from books only...lacking of real experience
In Study Pack AppendixW Activity1C: at last part of stopping headway calculation for Up Main, it says "To achieve the stopping headway, this signal would also have to be the first cautionary aspect, and hence 3 aspect signalling is appropriate(at least in the station area)". But I did not find any hint about why choosing 3 aspcet signal.
And 59s is for the train from 1st cautionary signal to stop signal, but I think it should also contain the constant speed section from the green signal to 1st yellow signal. Where is my error? In other years' stopping headway calculation, the headway usually contains 5 time section, but this only contains 4. So I am very confused why does this not contain the constant speed section...
Non-stopping calculation also uses 3min headway, but the required haedway is "Main Lines: following stopping at 80km/h"--I think it refers to stopping headway only. I am confused about why you take non-stopping and stopping headway both as 3min? I know, this situation is uncommon in other years' exams, which always have different headway for non-stopping and stopping.
Also in study Pack AppendixW Activity1C, Approach to Platform5(Up Main): it says an allowance of 111s for the time between Green and Red, and time taken to traverse the 40kph section is 35s, reducing from 80kph to 40kph is 22s, so leaves 54s at a constant speed. But I think it also should minus 12s sighting time...
I do not have much experience in railway work, so most of knowledge comes from books only...lacking of real experience