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Four-rail tracks?
I took a ride on the Greenford-Paddington shuttle yesterday, in the
light of its imminent truncation to West Ealing, and noticed some newish four-rail track between Drayton Green and West Ealing junctions. All four rails were firmly clipped to the concrete sleepers. I've not noticed it before -- does anyone know why it's used? https://www.flickr.com/photos/reclin...7667614586524/ More pictures in https://www.flickr.com/photos/reclin...57667614586524 |
Four-rail tracks?
"Recliner" wrote in message
... I took a ride on the Greenford-Paddington shuttle yesterday, in the light of its imminent truncation to West Ealing, and noticed some newish four-rail track between Drayton Green and West Ealing junctions. All four rails were firmly clipped to the concrete sleepers. I've not noticed it before -- does anyone know why it's used? https://www.flickr.com/photos/reclin...7667614586524/ More pictures in https://www.flickr.com/photos/reclin...57667614586524 You tend to see track like that on high viaducts, or anywhere else that a derailed train would have an uncomfortable landing if it left the railway altogether. e.g. around 29:06 on this video dating from 2005 https://www.youtube.com/watch?v=Jl9wBpvu86U You can see the same location, side by side in 1953 and 1983 at around 2:42 he https://www.youtube.com/watch?v=E6Ll96VNuSc -- DAS |
Four-rail tracks?
On Wed, 29 Jun 2016 13:42:32 +0100, "D A Stocks"
wrote: "Recliner" wrote in message .. . I took a ride on the Greenford-Paddington shuttle yesterday, in the light of its imminent truncation to West Ealing, and noticed some newish four-rail track between Drayton Green and West Ealing junctions. All four rails were firmly clipped to the concrete sleepers. I've not noticed it before -- does anyone know why it's used? https://www.flickr.com/photos/reclin...7667614586524/ More pictures in https://www.flickr.com/photos/reclin...57667614586524 You tend to see track like that on high viaducts, or anywhere else that a derailed train would have an uncomfortable landing if it left the railway altogether. e.g. around 29:06 on this video dating from 2005 https://www.youtube.com/watch?v=Jl9wBpvu86U You can see the same location, side by side in 1953 and 1983 at around 2:42 he https://www.youtube.com/watch?v=E6Ll96VNuSc I've seen that before but does it really work? Has there ever been a derailment on such stretch of track? |
Four-rail tracks?
wrote in message
... On Wed, 29 Jun 2016 13:42:32 +0100, "D A Stocks" wrote: "Recliner" wrote in message . .. I took a ride on the Greenford-Paddington shuttle yesterday, in the light of its imminent truncation to West Ealing, and noticed some newish four-rail track between Drayton Green and West Ealing junctions. All four rails were firmly clipped to the concrete sleepers. I've not noticed it before -- does anyone know why it's used? https://www.flickr.com/photos/reclin...7667614586524/ More pictures in https://www.flickr.com/photos/reclin...57667614586524 You tend to see track like that on high viaducts, or anywhere else that a derailed train would have an uncomfortable landing if it left the railway altogether. e.g. around 29:06 on this video dating from 2005 https://www.youtube.com/watch?v=Jl9wBpvu86U You can see the same location, side by side in 1953 and 1983 at around 2:42 he https://www.youtube.com/watch?v=E6Ll96VNuSc I've seen that before but does it really work? Has there ever been a derailment on such stretch of track? Here is a case where a freight train pretty much demolished the viaduct it was travelling on. No guard rails - there are many miles of track on similar viaducts in urban areas: http://www.railwaysarchive.co.uk/doc...Bexley1997.pdf -- DAS |
Four-rail tracks?
D A Stocks wrote:
wrote in message ... On Wed, 29 Jun 2016 13:42:32 +0100, "D A Stocks" wrote: "Recliner" wrote in message ... I took a ride on the Greenford-Paddington shuttle yesterday, in the light of its imminent truncation to West Ealing, and noticed some newish four-rail track between Drayton Green and West Ealing junctions. All four rails were firmly clipped to the concrete sleepers. I've not noticed it before -- does anyone know why it's used? https://www.flickr.com/photos/reclin...7667614586524/ More pictures in https://www.flickr.com/photos/reclin...57667614586524 You tend to see track like that on high viaducts, or anywhere else that a derailed train would have an uncomfortable landing if it left the railway altogether. e.g. around 29:06 on this video dating from 2005 https://www.youtube.com/watch?v=Jl9wBpvu86U You can see the same location, side by side in 1953 and 1983 at around 2:42 he https://www.youtube.com/watch?v=E6Ll96VNuSc I've seen that before but does it really work? Has there ever been a derailment on such stretch of track? Here is a case where a freight train pretty much demolished the viaduct it was travelling on. No guard rails - there are many miles of track on similar viaducts in urban areas: http://www.railwaysarchive.co.uk/doc...Bexley1997.pdf But this section of track in West Ealing is on the flat. No viaducts, no cuttings, no masonry bridges, nothing valuable close to the tracks (just open car parking). It's a low speed track (~25mph), on a gentle curve. I don't think it gets much freight traffic, and the passenger service trains are just two-car DMUs (the occasional HST may use it on diversion or for turning). |
Four-rail tracks?
These are definitely there for derailment containment.
There may be an overline structure which has a column and its base within the high impact zone in the case of a derailment. These guard rails would provide mitigation to keep any derailed train/vehicle away from that structure. OC |
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