which interchange used to be a terminal, then converted and
become an interchange at another area, then demolished and become
interchange, then yet another interchange is replacing it?
I am going to assume that 'replacing' means that a new
interchange is already scheduled to replaced the existing
interchange (or currently under construction)
It could be either
Woodlands Centre/Woodlands Regional/Woodlands Temp/Woodlands
Regional (Upgraded)
Or
Yishun Ave 5/Yishun/Yishun Temp/Yishun ITH (Under
Construction)
Can't really think of anything else