How did Flinders Street cope?

[J-P Wispelaere <oink@coombs.anu.edu.au>]

Looking at an old map of the Victorian rail network of 1946, I am struck
by the extraordinary number of lines radiating from regional centres. 
The north-west, in particular, must have been very rich in rail services
around this time, with at least four lines running parallel on either
side of the Mildura line to other rural centres.

My question is that, given that Flinders Street was Melbourne's only
central station at this time, how on earth was it able to cope with this
volume of traffic?  It had but twelve platforms at this time.  I assume
there must have been at least half a dozen night trains, and many more
day trains.  Where was all this rolling-stock stored?

Many thanks

Jean-Philippe.