|
|
Post by up1989 on Jan 14, 2019 17:33:55 GMT
Ive noticed there seems to be the TPWS cattle grids in the Harrow and wealdstone sidings used for bakerloo line trains to reverse. Ive never heard or seen a BR train use the sidings, which begs the question what was the point of signalling it that way?
Thanks all
|
|
|
|
Post by norbitonflyer on Jan 14, 2019 21:11:49 GMT
Ive noticed there seems to be the TPWS cattle grids in the Harrow and wealdstone sidings used for bakerloo line trains to reverse. Ive never heard or seen a BR train use the sidings, which begs the question what was the point of signalling it that way? Thanks all Presumably in case there is ever a need to reverse there (track possession north of H&W perhaps?) Or in case an NR train gets signalled into there in error. |
|
|
|
Post by goldenarrow on Jan 14, 2019 21:34:11 GMT
Well it is still NR instructure and signalling so any number of fitted trains/locos can be permitted to run on parts of the Watford DC when the WCML is closed for works for example although this is increasingly now a rarity, HST's used the DC in 1993 during engineering works and sticking to the times class 378's are TPWS fitted so could in theory use the reversing siding.
|
|
|
|
Post by up1989 on Jan 15, 2019 14:15:11 GMT
Well it is still NR instructure and signalling so any number of fitted trains/locos can be permitted to run on parts of the Watford DC when the WCML is closed for works for example although this is increasingly now a rarity, HST's used the DC in 1993 during engineering works and sticking to the times class 378's are TPWS fitted so could in theory use the reversing siding. But aren't the 378s tripcock fitted so wouldn't need tows. It makes sense incase of engineering trains and the like to have tows. I wonder why the outlet signals at stonebridge aren't TPWS fitted as well, because they are NR assets and have the WS cabin code. |
|
|
|
Post by goldenarrow on Jan 15, 2019 14:56:38 GMT
Well it is still NR instructure and signalling so any number of fitted trains/locos can be permitted to run on parts of the Watford DC when the WCML is closed for works for example although this is increasingly now a rarity, HST's used the DC in 1993 during engineering works and sticking to the times class 378's are TPWS fitted so could in theory use the reversing siding. But aren't the 378s tripcock fitted so wouldn't need tows. It makes sense incase of engineering trains and the like to have tows. I wonder why the outlet signals at stonebridge aren't TPWS fitted as well, because they are NR assets and have the WS cabin code. The /2's have tripcocks though I have no idea if LO trains on the DC actually use them but the rest get by with TPWS. Don't see why the outlet signals for Stonebridge Park Depot would need TPWS as the wash and depot is only tall enough for tube stock and what would need to get out would presumably need to come in and I'm assuming the inlet signals are protected against wrong route setting. NR signals without TPWS is not confined to here, IRC the Northern City Line has train stops only. |
|
|
|
Post by up1989 on Jan 17, 2019 18:35:42 GMT
But aren't the 378s tripcock fitted so wouldn't need tows. It makes sense incase of engineering trains and the like to have tows. I wonder why the outlet signals at stonebridge aren't TPWS fitted as well, because they are NR assets and have the WS cabin code. The /2's have tripcocks though I have no idea if LO trains on the DC actually use them but the rest get by with TPWS. Don't see why the outlet signals for Stonebridge Park Depot would need TPWS as the wash and depot is only tall enough for tube stock and what would need to get out would presumably need to come in and I'm assuming the inlet signals are protected against wrong route setting. NR signals without TPWS is not confined to here, IRC the Northern City Line has train stops only. Sure about the loading gauge, but 21 and 22 reception roads up to the stop boards have no loading restrictions, so could be used by BR maybe? |
|
|
|
Post by goldenarrow on Jan 17, 2019 19:45:31 GMT
The /2's have tripcocks though I have no idea if LO trains on the DC actually use them but the rest get by with TPWS. Don't see why the outlet signals for Stonebridge Park Depot would need TPWS as the wash and depot is only tall enough for tube stock and what would need to get out would presumably need to come in and I'm assuming the inlet signals are protected against wrong route setting. NR signals without TPWS is not confined to here, IRC the Northern City Line has train stops only. Sure about the loading gauge, but 21 and 22 reception roads up to the stop boards have no loading restrictions, so could be used by BR maybe? The LU/NR track boundary is immediately beyond the diamond crossover (512 and 511B points) so any stock moving beyond that location including moving up to the stop boards would require LU Track Certification. |
|
|
|
Post by up1989 on Jan 18, 2019 15:33:00 GMT
Sure about the loading gauge, but 21 and 22 reception roads up to the stop boards have no loading restrictions, so could be used by BR maybe? The LU/NR track boundary is immediately beyond the diamond crossover (512 and 511B points) so any stock moving beyond that location including moving up to the stop boards would require LU Track Certification. Ah that makes sense!Not worth the hassle for an extra reversing point for LOROL trains i guess, thanks for the info! |
|
roythebus
Pleased to say the restoration of BEA coach MLL738 is as complete as it can be, now restoring MLL721
Posts: 1,275
|
Post by roythebus on May 14, 2019 21:26:23 GMT
The fact that a NR unit may have trip cocks is immaterial; it will also need TWPS to run on non-trip-cock fitted lines. Like into Euston maybe? Beyond H&W on the DC lines?
|
|
|
|
Post by commuter on Jun 5, 2019 13:13:37 GMT
The LU/NR track boundary is immediately beyond the diamond crossover (512 and 511B points) so any stock moving beyond that location including moving up to the stop boards would require LU Track Certification. Ah that makes sense!Not worth the hassle for an extra reversing point for LOROL trains i guess, thanks for the info! L.O.R.O.L hasn't run trains Since november 2016. |
|
class411
Operations: Normal
Posts: 2,743 
|
Post by class411 on Jun 5, 2019 13:38:44 GMT
Neither TWPS nor LOROL are in the abbreviations list. Guessing T?PS is Train  ? Protection System. LOR?L, perhaps London Overground Railway Line? |
|
|
|
Post by goldenarrow on Jun 5, 2019 13:50:58 GMT
Neither TWPS nor LOROL are in the abbreviations list. Guessing T?PS is Train ? Protection System. LOR?L, perhaps London Overground Railway Line? rain Protection & Warning System - Works in tandem with the Automatic Warning System, both safety features designed to mitigate against compromise to signal overlaps on Network Rail infrastructure. Watford DC is equipped with these plus mechanical train stops for LU stock which aren't fitted with TPWS/AWS. London Overground Rail Operations Limited were the franchise operators from the inception of the Overground till late 2016. LOROL was a 50/50 partnership between Arriva and Hong Kong based Mass Transit Railway (MTR). Arriva and MTR then decided to go it alone with the franchise renewal with Arriva being the victors in the form of Arriva Rail London (ARL). |
|
Chris M
Global Moderator
Forum Quizmaster
Always happy to receive quiz ideas and pictures by email or PM
Posts: 19,758
|
Post by Chris M on Jun 5, 2019 13:56:57 GMT
AWS (Audible Warning System), ARL (Arriva Rail London), LOROL (London Overground Rail Operations Limited), and TWPS (Train Protection Warning System) probably should be added to the abbreviations list as they come up periodically.
|
|
|
|
Post by MoreToJack on Jun 5, 2019 14:03:08 GMT
AWS (Audible Warning System), ARL (Arriva Rail London), LOROL (London Overground Rail Operations Limited), and TWPS (Train Protection Warning System) probably should be added to the abbreviations list as they come up periodically. Good shout. We’ll get this actioned. |
|
Tom
Administrator
Signalfel?
Posts: 4,196
|
Post by Tom on Jun 5, 2019 21:30:41 GMT
AWS (Audible Warning System) Good shout. We’ll get this actioned.AWS is Automatic Warning System |
|
Chris M
Global Moderator
Forum Quizmaster
Always happy to receive quiz ideas and pictures by email or PM
Posts: 19,758
|
Post by Chris M on Jun 5, 2019 21:55:27 GMT
My mistake, although the warning given is audible (and visual). The railway does seem to use an "Audible Warning System" too, but this is to provide warnings of approaching trains to level crossing users (appears to be in use only at some crossings).
|
|
? Protection System.
