Because there is really no need for sv 68 to be honest.
If it is Pasir Ris - Tampines service, you already have 3, 15,
17, 21, 39, 58, 81, 518 covering different parts of Tampines to
Pasir Ris Town.
If purpose of 68 is to connect Tampines North new town, the new
town will be operational from only 2019. So what's the purpose of
introducing now and have empty buses running on it.
I think after 46 experience they may have decided to delay the
launch.
Another reason,PSR is already at it maximum capacity..Ask them
to start from Changi Village passingby Loyang depot,Hafiz from LTA
replied too many duplicate..