Regarding this, I think it is possible.
So as to consolidate LTnF1fan's post, on the second thought i think
the middle track can be use for this purpose:
AFAIK, I am still not very sure the PYL's track diagram, hope I
can see it soon.
But, what is known from Wikipedia is that Promendae will not
have a middle platform, and it will interchange with DTL as well as
Marina Bay Extension, the well perceived of inital Circle Line
Stage 6. Since for CCL part, Promenade will be a normal station,
and unlikely any station between Promendae and Paya Lebar can be
used for terminus like LTE or sort of (As least for Paya Lebar -
Nicoll Highway sector, remember I sneaked there before?), I think
it will be an extra track for the time being and until the Marina
Bay Extension opens (Promenade, Bayfront and Marina Bay) in 2012. U
can claim that it can runs through to Harbourfront, but I think
there wont be sufficient train for peak hours (Remember the CGL -
Boon Lay direct?). Please I dont think it can go Dhoby Ghaut based
on the line alignment unless they allow reversing (And if this also
can, then why must they Spanish Solution in Yishun peak hour
train?)
Promendae layout is unique cross of the old , structurewise of
the station is very similar to the present CTH station of the NS/EW
line
however it function would be much different from CTH
since it can also function something similar to Tanah merah
station since it is also one of the stations in the CCL extension,
Based on the map one can see that theres 2 branches there,
only station close to that function it tanah merah station, but it
does not have an additional line to interchange with beside to
tampanies and Changi airport.
in short whati expect might be a interchange for not only
DTL but also to CCL marina bay where Promendae is one of the
terminus point.
