Currently we have two Island platforms right?
So what NickL trying to say is, there's gonna be another
one.
Current Island platform is:
To Joo Koon connect with the from Marina Bay
To Pasir Ris/Changi Airport connect with the from Marina
Bay..
So total: 2 Island platform...
Island platform, is a single platform between at least two
tracks which serve both of them..
Read up more here...
or read more about the Spanish Solution
(Barcelona solution)