This the reality of what is reasonably needed, can be afforded and will most likely happen short - medium term:
1. Extension electrification Cranbourne to Cranbourne East .
2. Extension of Werribee electrification to Wyndam Vale.
3. Electrification following duplication to Melton., for completion by Metro Tunnel opening .
4. Electrification of the RRL track pair from Southern Cross to Wyndamvale via Tarneit .
Allows Tarneit & Wyndam Vale to be served by sparks, releasing V/Locity capacity to cater for Geelong growth .
RRL is supposedly future proofed for electrification. Well, that was part of the design scope.