wrote:

No big secrets, but I can't think of a line more suited to
evening/weekend closures,

Disagree. With the access problems for things like rails and sleepers,
progress would be very slow if the project were done piecemeal, with
very great risks of disruption every Monday morning.

or where the 2 min journey time decrease is less relevant.

It's very relevant on a line with only five trains, because you can run
more journeys with the existing stock. How are they going to achieve 2
minutes compared with the current 4?

Some classic "LUspeak" though - "heritage features to be retained
- EH?2 (must be the NSE finishes at Bank!) and the phrase "show
piece project". The trains are so little used in comparison to
other lines they hardly need livery change, new
upholstery or changed window glass - why not do something about the
window etching endemic on the other lines run by Metronet?

The livery is NSE and is 12 years old. Remember that there is no easy
way to take stock off to a depot for refurbishment in n years time, and
only one spare train currently. In my view it's sensible to use the
5-month break to refurbish even if it's a bit early.
--
Richard J.
(to e-mail me, swap uk and yon in address)

snip

or where the 2 min journey time decrease is less relevant.

It's very relevant on a line with only five trains, because you can run
more journeys with the existing stock. How are they going to achieve 2
minutes compared with the current 4?

snip
--
Richard J.
(to e-mail me, swap uk and yon in address)


From my understanding its not a exact decrease in journey time obviously you
can't cut an approximately 4-5min journey by 2min. What it is talking about
is journey time capability (JTC) which is a theoretical number which comes
out the end of a stats formula based on the it takes to get between two
places and takes into account things like door opening and closing times and
real journey time.
Andrew

Andy wrote:
snip

or where the 2 min journey time decrease is less relevant.

It's very relevant on a line with only five trains, because you
can run more journeys with the existing stock. How are they going
to achieve 2 minutes compared with the current 4?

snip
--
Richard J.
(to e-mail me, swap uk and yon in address)


From my understanding its not a exact decrease in journey time
obviously you can't cut an approximately 4-5min journey by 2min.
What it is talking about is journey time capability (JTC) which is
a theoretical number which comes out the end of a stats formula
based on the it takes to get between two places and takes into
account things like door opening and closing times and real journey
time.
Andrew

I've read that three times and still don't understand it. If JTC takes
into account real journey times plus door opening and closing times, it
sounds realistic to me, rather than theoretical. Where do statistics
come into this? And my question remains unanswered: how are they going
to achieve 2 minutes instead of 4?
--
Richard J.
(to e-mail me, swap uk and yon in address)

In article ,
Richard J. wrote:
From my understanding its not a exact decrease in journey time
obviously you can't cut an approximately 4-5min journey by 2min.
What it is talking about is journey time capability (JTC) which is
a theoretical number which comes out the end of a stats formula
based on the it takes to get between two places and takes into
account things like door opening and closing times and real journey
time.
Andrew

I've read that three times and still don't understand it. If JTC takes
into account real journey times plus door opening and closing times, it
sounds realistic to me, rather than theoretical. Where do statistics
come into this? And my question remains unanswered: how are they going
to achieve 2 minutes instead of 4?

If the JTC is the expected time between ariving on platform A and
departing on platform B, they may achieve a 2 minute reduction by
having a train every 2 minutes (ie, an average wait of 1 minute)
instead of every 6 minutes (ie, an average wait of 3 minutes).

--
Mike Bristow - really a very good driver

Mike Bristow wrote:
In article ,
Richard J. wrote:
From my understanding its not a exact decrease in journey time
obviously you can't cut an approximately 4-5min journey by 2min.
What it is talking about is journey time capability (JTC) which is
a theoretical number which comes out the end of a stats formula
based on the it takes to get between two places and takes into
account things like door opening and closing times and real
journey time.
Andrew

I've read that three times and still don't understand it. If JTC
takes into account real journey times plus door opening and
closing times, it sounds realistic to me, rather than theoretical.
Where do statistics come into this? And my question remains
unanswered: how are they going to achieve 2 minutes instead of 4?

If the JTC is the expected time between ariving on platform A and
departing on platform B, they may achieve a 2 minute reduction by
having a train every 2 minutes (ie, an average wait of 1 minute)
instead of every 6 minutes (ie, an average wait of 3 minutes).

The reduction that bowroaduk mentioned was in journey time -- "improved
journey time (circa 2 minutes)" -- not in service interval. Does anyone
have access to the WTT and can clarify what the current timings are?
CULG says the "end-to-end" journey time is 4 minutes, but I'm not sure
if that means from/to the Waterloo platforms or the depot.
--
Richard J.
(to e-mail me, swap uk and yon in address)