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Mizter T · September 20th 06, 09:06 AM posted to uk.transport.london

Neil Williams wrote:

wrote:

Thanks for the reply. I have not noticed this on Underground or
mainline tracks - so is there a reason this apply to Docklands only ?

You do get them on the mainline, though not always in the same form.
LUL doesn't need them on most of its tracks as they are mainly jointed
rail, and jointed rail has a gap between each section of rail anyway
(which gives rise to the clickety-clack sound when travelling over it),
so it doesn't need them.

Neil

I'm a bit out of my depth here as I don't really appreciate the
difference between unstressed welded rail (UWR), long welded rail (LWR)
and continuous welded rail (CWR), but it seems to me that where there
has been recent track replacement on the Underground welded rail as
opposed to jointed rail has been used, resulting in a smoother ride and
no-clickety-clack sound.