I'll leave you to quibble about the difference between rebuilding and making
large structural changes. Playing with semantics is a tedious game and one
I'm not willing to play.
I'm glad you are very clear about the benefits of the work done at Victoria.
Judging from radio traffic reports and from public statements from TfL and LU,
the main problem at Victoria does not involve people with business in the
Victoria area. The main problem is the capacity of the Underground Station in
the morning peak period. Frequently LU have to stop passengers from entering
the Underground Station because it is over subscribed. Why are those
passengers trying to board a LU train? Because they do not want to be in
Victoria and have no business there! TfL have said on several occasions that
the work being done to Victoria Underground Station is to rectify that
situation.
One of the benefits of extending the Northern Line to Clapham Junction is that
it would greatly reduce that pressure on Victoria, and on Waterloo too of
course. A second reason for such an extension is that as Clapham Junction is
the busiest railway station in the country, it is absurd that it is not connected
to the Underground system.
Injecting new capacity into public transport is not exclusively about providing
new journey opportunities. It is also about improving quality and convenience.
It is already possible to travel by public transport from anywhere in the
Greater London area to anywhere else but many journeys are slow, irksome
and in overcrowded conditions. For example, someone living in Croydon with
tickets for the Dominion Theatre can make the journey by travelling to
Clapham junction, changing to a Waterloo train and changing to a crowded
Northern Line train. Two train changes. Alternatively they can go through to
Victoria and change to an overcrowded Victoria Line train and change again
to a overcrowded Central Line train. Again two changes. If the Northern Line
were extended to Clapham Junction, only one change would be required, and
that would would be to a train that was almost empty. The improvement in
quality and convenience would be substantial.
As London's population has hugely outgrown the infrastructure, enormous
investment in new infrastructure is urgently needed. (Even politicians now
recognise that far more housing is required) Because the cost of building
entirely new railways is so expensive, it is unrealistic to imagine that five or
six new lines will be constructed in the next twenty years. Instead we will
have to add capacity by increasing the opportunities to change trains and by
squeezing more use out of the existing routes. (It was interesting to hear
Peter Hendy last Saturday say that the Victoria Line will soon be running 33
trains an hour) One way of increasing the Northern Line's capacity is to split it
into two separate lines and to re-signal the two parts so that they can each
run trains reliably every three minutes.
As Wandsworth Council have already said that they would pay for a further
extension to Wandsworth, there is a potential extra benefit in bringing the
Northern Line to Clapham Junction. The final advantage of such an extension
is that it would be very heavily used and would not be a huge loss-maker.
I'm puzzled by your ideas about a Northern Line station at Clapham Junction.
The Northern Line is a tube line so it would be underground, perhaps right
underneath the main station, as is the case with many other Underground
Stations. I imagine such a station would require a long passageway from both
St. John's Hill and Grant Road, ideally with two travelators. London
Underground do know how to do this. They built the Jubilee Line station at
London Bridge and they kept it underground. I don't understand why you feel
that doing something similar at Clapham Junction would be so difficult.