There were complaints about traffic jams both within Punggol and especially at the exit point to TPE since year 2006. Search around Punggol.sg and you will find hundreths of threads written on the above subject.
The authorities had painted beautiful pictures of new road extensions and at least two new expressways over Serangoon river towards Pasir Ris.
this probably may take another 10 years to implement and materialize.
Singapore is supposed to be well known in town planning and teams of experts had been sent overseas to advice foreign goverments on town planning. Cannot understand why Punggol is being planned the way it is now with heavy traffic jams at major exit points. Not forgetting those who had to take buses to schools and offices with most buses arriving at bus stops with commuters standing on entry door steps.