London Underground track
 

"Richard J." wrote in message ...
wrote:
In article ,
(Smokeyone) wrote:

Well, my mistake in counting four keys, my only excuse is I was in a
moving crowd on the platform at the time. We'll have to see how long
it takes to replace the missing ones. I am in London in a couple of
weeks and will make a detour to visit Edware road unless someone can
visit sooner.........

Smokeyone

Although unlikely, it may have been that there was on-going track
maintenance where the keys were being replaced. When this happens,
there are often many of the keys missing over a section and the train
is restricted to a temporary speed restriction over that area by a
handsignalman. However they are normally all replaced within a very
short time period (e.g. during that shift).

There was no evidence of any other track work in progress and no TSR (but I
think it's 15 mph anyway into Platform 3 at Edgware Road). The keys had
been missing for at least 2 days, and the station supervisor appeared not
to be aware of the problem.


Any news about Edgeware Road yet.......................

Smokeyone

London Underground track
 

Steph wrote:

In article ,
(Smokeyone) wrote:

Well, my mistake in counting four keys, my only excuse is I was in
a moving crowd on the platform at the time.

I realised today that I had miscounted a run of 6 keys as 5, with no such
excuse!

We'll have to see how long it takes to replace the missing ones.

Any news about Edgeware Road yet.......................

I was there this afternoon, and the track is still in the same state,
namely a total of 15 missing keys on the rail nearest the platform in
Platform 3, Edgware Road, including this sequence (corrected from previous
version):

o K o K o o o K o K|K o K K K K|K K o o o K K K o

where K=key, o=missing key, |=rail joint.

It's now 5 days since I reported it to the station supervisor. Can
JDickseun advise whether a temporary speed limit would be expected for such
a sequence, and if so what speed? (The normal limit here is probably only
15-20 mph.)
--
Richard J.
(to e-mail me, swap uk and yon in address)

London Underground track
 

"Richard J." wrote in message ...
I was there this afternoon, and the track is still in the same state,
namely a total of 15 missing keys on the rail nearest the platform in
Platform 3, Edgware Road, including this sequence (corrected from previous
version):

o K o K o o o K o K|K o K K K K|K K o o o K K K o

where K=key, o=missing key, |=rail joint.

It's now 5 days since I reported it to the station supervisor. Can
JDickseun advise whether a temporary speed limit would be expected for such
a sequence, and if so what speed? (The normal limit here is probably only
15-20 mph.)

You wouldn't put in a speed restriction, since keys can be replaced
very quickly (!). Speed restrictions are used when a repair would take
a long time and cause severe delays to services. By restricting speed
the service can still run, but there'll usually be delays.
The safety limits are not more than 3 keys missing out of any 5 in a
row, and/or 30 out of 100. The keys are meant to be replaced within 4
weeks. The sequence above does contravene the safety standards, and
should (theoretically) be repaired within a month. What does scare me
is that if the second key, or the third key, dislodges / breaks, then
there's 5 in a row missing. They should be attended to immediately,
especially since they'll be very heavily loaded because all the other
keys are missing.
HTH
John