On Sun, 7 Jan 2007 19:18:30 +0000, Paul Terry wrote:

I find it confusing! Can someone please explain it to me in
laymans terms.

The line continues beyond the platform ends at both terminii for two
reasons. During normal service hours they provide an over-run so that if
for any reason the normal stopping and safety procedures fail, trains
don't immediately run into a solid wall.

I assume it also obviates the need for TETS (aka Moorgate control),
which would require trains to slow to 10mph on approach to the
platform.

This saves time - particularly important on the Vic with its very
tight turnarounds, which include stepping back.

(Explanations of TETS and stepping back shouldn't be hard to find with
a quick search.)