Interesting to see that the Commissioner  has just said that engineers have confirmed a noise problem between Walthamstow Central and Blackhorse Road and that further work is being done. The cause is the vastly higher number of trains moving across the line and the identification of new "hot spots" (probably associated with how ATO works). Seems something similar has happened at Archway (apparently residents have been waiting 2 years for rail grinding work to be done and have suffered severe noise issues).
Mike Brown has also said LU is now going to look at possibly owning its own grinding train rather than using hired in vehicles. With either option there is an apparent issue with getting a rail grinder across the network and pointwork. If memory serves an old rail grinder had a tendency to "fall off" the rails.
 Appearing at a London Assembly Plenary session.
Post moved from old thread by superteacher as a new thread is more appropriate for this discussion.
So is the issue with higher number of trains causing the track to wear quicker and thus be more noisy, or is it just simply a case of more trains = more frequent noise when they pass?
From what was said (and I can remember) it seemed to be a combination of
a) more train movements. b) ATO always causing trains to brake / accelerate in the same place concentrating wear (and thus noise) in specific areas. Drivers are rather more random in how they drive trains so rail wear is not so concentrated. When I was involved in some Journey Time Capability stuff and future ATO systems there was a clear understanding that you could get engineering issues arising from ATO systems and how they control train movement. This may on the rails but also on rolling stock but it takes time for things to emerge / become clear. c) there may be some specific issues at Walthamstow with the way the track was laid / rail insulation etc.
I'd need to rewatch the webcast of the Assembly session to confirm the above and it's a bit late to be doing that right now.
Heathrow loop on the picc line some times noisy going round it because one way round traffic the rail on one side that goes out of profile then they have to send in the rail grinder. FISH7373 81C NFP
Biography N/A Location london Interests railways Occupation tube lines Northfields railway depot Piccadilly line trains project engineer Local Railway southall railway depot 81c fitter Full Name kevin william fisher www.flickr.com/photos/fish7373/