"Tom Anderson" wrote :
Are you suggesting that with the new signalling, the line could be run
un-split and be as frequent and reliable as in the split case?

Most of the Northern Line unreliability originates at the Camden junctions,
not at the southern end.
A much higher number (and proportion) of West End trains could terminate at
Morden, rather than Kennington, once the signalling allows a higher line
capacity.

The main reason that most City, rather than West End, trains continue to
Morden is simply the limited reversing capacity at Kennington on that
branch. But needless to say, failing to utilise what reversing capacity they
have got is sold to us as a reliability gain, rather than what it really
is - 'operational convenience'. And maybe softening us up for the line split

During much of the 1990s, many more trains on the West End branch terminated
at Morden; it's perfectly possible, and IIRC, the Tooting reversing
facilities are underused, too.


--

Andrew

"She plays the tuba.
It is the only instrument capable
of imitating a distress call."