Bus Service 459 is an upcoming limited-stop bus service to be introduced under the Land Transport Authority’s Bus Connectivity Enhancement Programme (BCEP).
This service connects Punggol town with Tai Seng MRT station and is part of the first batch (comprising of 3 peak period limited-stop services) to serve Tai Seng MRT Station.
Reference:
Back to Bus Services
Back to Limited-stop Peak Period Bus Services

If I were to guess this service’s route…
Punggol Stn – Punggol Ctrl – KPE – Tai Seng MRT
most likely punggol coast int then punggol way then punggol north Ave or punggol drive then punggol east sengkang east drive then buangkok drive then tpe then tai seng.