On the Vryheid Oos section of the Coal Line.
Here is the neutral section along with one heck of a traction power feed.
The painted rails on the ground are some sort of localized path for the return traction current.
As South Africa's electricity is generated and supplied by Eskom, that is, all on one phase clock.
I can not recall if the Coal Line has phase breaks.
Most likely not, as Eskom may have the entire national grid on one phase clock, but I will have to check this little detail on my next visit.
B.W. Ring, 2001-May-02, On the South African Coal Line
Olympus E-10: f=3.6, s=1/500 sec, fl=66 mm, ISO=80, filter=uv, 2240x1680x24-bits, 72dpi jpg, 740k.
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Cropping(none), ACE(Neutral/Mild/Natural), ASE(Normal/Weak), Pixel Resize(SP).