The introduction of inland rail between Melbourne and Brisbane will surely reduce the number of freight services transiting the Sydney area and therefore this project is highly unlikely to be required.
Money would better be spent on Brisbane SG and taking Inland Rail North of Brisbane as SG.
Melbourne could do with some funding for rail terminals and I can also see value in Mount Gambier and Portland Line upgrades ahead of this stupid investment.
Western Sydney Freight Line a highlight of Infrastructure list: ARA
Wrong because there is plenty of freight happening in Sydney. Inland rail isn't going to do much other then take the Brisbane to Melbourne, Adelaide and Perth freight which isn't that much of Sydney's freight task. Western Sydney airport is going to need a rail terminal as well.
Sims, I don't know if it still exists or not, but there is/was an alignment set aside to connect from the Southern line to the western line, it was meant to join between Werrington/St Marys, while there is some areas that could be developed still, with the amount of new housing estates in between the Western line and Southern line it may be a lot harder now. The aspect of the Western Sydney airport now having a metro rather than HR line that could have worked better will also make it harder for the line, as the Leppington branch was looked at to extend to the Airport, but I think that has been likely canned and the freight corridor will also be a non event as the metro to St Marys from the airport is likely to used for the metro.
Several options were also put in place that included connections to the Erskine Park and surrounding industrial areas, the St Marys hub and the old Defense dept area could well be part of a joint working option.
With the St Marys hub getting the go ahead, I would believe it is more for Port shuttle working than anything else and that could create issues with additional Paths being required on the Western Line.