Seriously, with full knowledge of overcrowding on EWL/NSL, what
were they thinking? Never mind about order 3-cars and running them
in this formation for now, they can always order more later. They
should have just built stations to fit 6-cars. When the crowd comes
for real (perm or peak hrs), at least they can couple them
together, and order additional trainsets if needed.
If they already know there are serious concerns about meeting
the frequency to squeeze everyone on board due to signalling
limitations, then all the more they should have longer trainsets.
Even the Taiwanese knows this, doing the same on the Muzha Line.
The problem is going to come back to haunt them in a decade or two.
Same goes for DTL, also 3-cars.
When the decision to choose automatic as the operation mode it
already signal a bad end, adding on with three train carriages and
so on...
Trains, yes, can add later on. Perhaps its the
infrastructure side not doing well enough. Well three carriages
does sound short, but a platform for three carriages (and that's
about being permanent) sounds ever shorter.
Three carriages and three carriages long platform plus
comprehensive bus network helping it, no one might be able to spot
the problem. Kill the bus and live (die) with the rail, we hope
this will not happen.