Route Control Tables 2004

[PJW]

In route CT:
1? In 123(M), does it need 208N? I am usually confused about similar situation. In the standard, I remember it says flank protection is decided by the distance between 2 points. But in the layout, I can not justify whether 208 provide flank protection to 209.

208 do not provide flank in this instance.
However 208 and 210 are both in the same track circuit and therefore generally candidates for point-to-point locking if that is a feature of the interlocking. Often where point-to-point is appropriate then it does provide flank and hence looking for it can be a way of ensuring a student doesn't overlook flank. Here I agree that don't gain anything by 123 calling 208; however don't lose anything either (provided it os only CALL not DETECT). So not wrong to include but also not wrong to exclude. In many cases it might be wrong to exclude, so therefore I thought it best to teach people always to include; I think this is a useful exam passing technique.

2? In the route 142B(M), why 129A(S) appears in opposing route locking? 129A(S) requires 207N, while 142B(M) requires 207R? And 135 is similar situation. I think 135 requires 212A R, while 142B(M) requires 212A N.

Because of sectional route release.
129A(S) requires INITIALLY 207N but when train using that route passes clear of EJ and is still on EK then 207 becomes free. However the train is still opposing 142B(M) and that is the reason why we need the opposing locking that way around. However in the converse direction it is not needed; 142B(M) holds 207 locked reverse until train has cleared DE and is on DC by which time it is safe for 129A(S) to set. In that direction you are correct that the locking of the points is adequate and there is no opposing locking to show.

3? Also in 142B(M), I think when 203R, it should require 204N. is it right?

204 gives no flank in this case and therefore it really doesn't matter if you include it or exclude it; as above.

4? In his CT, aspect column, BR stands for what?

Banner Repeater signal

5? In 144A(S), why does it not require FB clear?

Because it is a shunting movement whose whole purpose is to be able to join one train with another. Ask yourself where is it sensible for a locomotive to join it wagons. The answer must surely be on FB track within the Up siding! Therefore excluse that track from the aspect controls but include all the others within the route as wuld not want to join a train stood on them.

[quote]
In point CT:
1? If the track is dead locking TC, it should not appear in the column of