Coming from Ireland where such infrastructure is sadly lacking, I remain pleasantly gobsmacked by the proliferation of cycle/pedestrian ways throughout Brisbane. This one that follows the railway is great but leaves me wondering - why would I cycle, run or walk when I could take a train or, alternatively, why would I pay to take a train when I could cycle, run or walk?
The housing estate K's house is on is still being built but I had not realised until today that the nearby rail link joining Petrie to Kippa Ring is also new, being first opened in October 2016. Doubtless this has in turn spawned the housing developments. The YouTube clip below is a time lapse of the construction of Mango Hill station.
The track is of course the usual Queensland narrow gauge 1,067 mm (3 ft 6 in) as is evident from my picture below. Traction is obtained from the overhead catenary at 25kV. As I could not figure where the rail-side transformers get their power from I took a picture of one so that I could research later. But although I found the manufacturer I am still in the dark about how the units are connected.
Maybe there is a HV line traveling with the lower voltage line that runs the train along the tracks, and every so often a transformer boosting the lower voltage?
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