This is based on the eventual conclusion of the PTV Network Development Plan (plus a few of my own conclusions and assumptions), if that ever happens.
Named after the station that is to become the Interchange, and also provides some symmetry to the Royal Park Line.
The Interchange between the two points. As these lines will still be going through the City Loop, the ‘Ring’ portion of the name is also evocative of this.
I liked the idea of naming the lines after inner-city streets, given that they are all historical and not too controversial. The Glen Waverley line already runs direct to Flinders Street Station most of the time, as do trains from Williamstown and Laverton. Laverton here, by the way, refers to services via the Altona Loop.
The Sunshine-Dandenong line that will be created by the Melbourne Metro Rail Project. Going under Swanston Street, I think the Swanston Line would be the perfect name for it. I also think that electrification to Melton, when it does occur, should proceed to Bacchus Marsh straight away.
The Frankston Line and Craigieburn lines are to be joined through the City Loop. As much of this occurs under La Trobe Street, it might as well be named that.
I found this line a hard one to suggest a name for. I went with one of the biggest landmarks on the line, which is almost half way between the two termini, Royal Park. It also helps create a nice symmetry with the Victoria Park Line.
Once again taking the name of the street it will go under, the Spencer line will be the result of a Melbourne Metro 2 Project, connecting the South Morang Line to the Werribee line, via Fishermen’s Bend. I’ve taken the liberty of extending the Mernda Extension even further to Whittlesea as a projection for future growth out in the Northern Suburbs.
Under the current Vline Service it is called the Geelong Line, and I see no reasons to change that.