| Operator
|
Route
|
Year
|
Date
|
Service changes
|
 (Current) Known as prior to 1 November 2001
|
Toa Payoh ↺ Lor 1 Toa Payoh
|
1983
|
26 December
|
Introduced between Toa Payoh Int and Lor 3 Toa Payoh (Loop).
|
| 1998
|
31 May
|
Amended to Toa Payoh Temp Int.
|
| Serves new pair of bus stops outside and opposite Toa Payoh Swim Cplx along Lor 6 Toa Payoh.
|
| 2002
|
19 May
|
Amended to Toa Payoh Integrated Transport Hub.
|
| 2010
|
31 January
|
Amended to ply Lor 6 Toa Payoh and Toa Payoh East, skipping Lor 4 Toa Payoh.
|
| 18 October
|
Designated wheelchair-accessible bus service (WAB).
|
| Toa Payoh ↺ Toa Payoh Link
|
2012
|
11 March
|
Extended to loop at Toa Payoh Rise.
|
| 2021
|
28 August
|
Serves new bus stop outside Caldecott Stn Exit 4 along Toa Payoh Lk.
|
| 2024
|
24 March
|
Serves new bus stop outside Blk 131B along Toa Payoh Rise.
|