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)