Maybe they are planning to do something in that area if funds were to become available in the budget that may warrant the tracks to be temporarily shifted, while they undertake a construction project there. If that was to be the case it would be a waste of tax payers money to upgrade the track and then dig it up again why the new construction was undertaken
It may be that they actually intend to build the proposed new overhead Oaklands station. This would necessitate a ramp where the wooden sleepers are situated and the possible re-location or elimination of Warradale station.
As the cost will be very great and much more urgent measures like the electrification of the Gawler Central line will have to be paid for with severely restricted finances, this is not likely. We may well see the rebuilding of this section of track as part of the present project.
As a long-time resident of Warradale I, like many local people with whom I speak, fail to see the necessity of such a grandiose scheme which realistically seems like 'pie in the sky' when there are what seem to us to be much cheaper alternatives. This is another thread, so I will put some thoughts in the Oaklands Crossing discussion for you to consider and dissect.
SAR526, you may be right on the right track, you could just pick up/copy the Black Forest overpass and put it there, that would eleviate all of the issues to do with congestion and conectivity