First up, any proposition of a commercial passenger transport rail service in Tasmania on the rail network as it currently stands
, is pure fantasy and any serious suggestion of such, diminishes the credibility of the restitution of any form of rail passenger service in the state, and damages the credibility of realistic rail passenger advocates.
Two major things need to happen before any commercial rail passenger transport service would ever be feasible. 1] The main south line would have to be TOTALLY re-routed between Brighton and Antill Ponds (via the Jordan River Valley) and the existing line via Campania, Colebrook, Rhyndaston and Parattah totally abandoned. Simple deviations on the existing line would never be sufficient; 2] The rest of the MSL and Western Line seriously upgraded to high-speed capability, with multiple deviations, curve straightening and super-elevation. Anything less than a 160kph maximum (for passengers) or 110kph average, would be insufficient. Obviously that would cost a fortune - however, the benefits for freight (140kph max) would also be substantial. The prospect of there ever being the money available to fund that is very doubtful (as worthwhile as it would be).
The only realistic prospect at present for passenger services in Tas are those that are currently proposed, i.e. Hobart commuter rail; DVR on the Derwent Valley Line and TTMS on the Hobart Line (which may merge to capture the cruise ship market), LNER on the North-East Line and DRR on the Western Line. Destination & experienced based tourist services in specific limited areas are viable. Expanding those services state-wide is not realistic at present but with a change of management at Tasrail (and State Govt) or a dynamic main-land based entreprenurial player entering the scene, state-wide T&HR services could potentially return.