The time to switch on the desalination plant at Kurnell to supplement Sydney's water supply, is when the water level in Warragamba Dam is at 30% capacity.
It appears the RMS has the same sort of approach with it's new Hi-Vis yellow clearway signs.
Only the really bad drooping signs were re-adjusted recently in the Sutherland to Carrs Park section
By co incidence this one in Sylvania mentioned two pages ago, looking as above,
now looks like this,
but the photo below of a sign not far away, it appears is not at the correct angle yet to qualify remedial action