In article .com,
Boltar wrote:

I'll wager the northern section will be hardly used much more than the
current ELL until it links to highbury and even then it won't be that
heavy. The southern section will probably be very busy though from the
start with all the docklands commuters.

From TfL:

4. If current tube line continued, passenger numbers would increase
to 11.6m by 2011 the new railway will carry 35.4m (phase 1). More than
50m passengers will use the line when both phases are complete.
5. Phase 1 of the new line will transfer an estimated 1.4 million
journeys from road to rail rising to two million when phase 2 is
complete.

E.