- SG6223Y, SG6222A, SBS8245J & SBS8280G will perform one (1) down-route trip as Service 21 from Sims Avenue (Bus Stop 82061 - Eunos Stn/Int) towards Pasir Ris Interchange before & during Weekdays AM Peak, departing at 0550 hours, 0600 hours, 0618 hours & 0631 hours.
- SBS3272M (Service 22) will
- operate on Service 21 on Sundays & Public Holidays.
- perform two (1) supplementary trip as Short Trip 21A during Sundays & Public Holidays PM Peak departing at 1756 hours.
- perform one (1) down-route trip as Service 21 from Geylang Road (Bus Stop 80089 - Bef Lor 18 Geylang) towards Saint Michael's Terminal during Sundays & Public Holidays PM Peak.
- SG5116E (Service 21) & SBS6624L (Service 21) will perform one (1) down-route trip as Service 21 from Changi Road (Bus Stop 82069 - Aft Lor 106 Changi) towards Saint Michael's Terminal before Weekdays AM Peak, departing at 0555 hours & 0607 hours.
- SG6233T (Service 21) & SBS3013U (Service 21) will perform one (1) down-route trip as Service 21 from Changi Road (Bus Stop 82069 - Aft Lor 106 Changi) towards Saint Michael's Terminal before Weekdays AM Peak, departing at 0555 hours & 0606 hours.
- SBS3158K (Service 21) will perform one (1) down-route trip as Service 21 from Changi Road (Bus Stop 82069 - Aft Lor 106 Changi) towards Saint Michael's Terminal before Sundays & Public Holidays AM Peak, departing at 0555 hours.
- SG5536B (Service 21) & 1 AMDEP DD will
- perform two (2) supplementary trips as Short Trip 21A during Sundays & Public Holidays AM Off-Peak & PM Peak departing between 1652 hours & 1742 hours.
- perform one (1) down-route trip as Service 21 from Geylang Road (Bus Stop 80089 - Bef Lor 18 Geylang) towards Saint Michael's Terminal during Sundays & Public Holidays PM Peak.
- Several random BNDEP DDs will operate on Service 21 on Weekends & Public Holidays.
- Several random AMDEP DDs will operate on Service 21 on Sundays & Public Holidays.
- Full DD fleet for BNDEP on Weekends & Public Holidays.
- Majority DD fleet for AMDEP on Sundays & Public Holidays.
- This service uses coloured information plates.
21 (towards Pasir Ris Interchange)21 (towards Saint Michael's Terminal)
- Weekdays: Ang Mo Kio 12A-12P / 7S / 2T; Bedok North 7A-6P / 1S (29 buses)
- Saturdays: Ang Mo Kio 12A-15P / 1T; Bedok North 7A-7P (23 buses)
- Sundays & Public Holidays: Ang Mo Kio 8A-10P / 2S / 6T; Bedok North 6A-7P (25 buses)
- Special Weekdays: Ang Mo Kio 12A-12P / 3E / 4S; Bedok North 6A-6P / 1E / 1T (28 buses)
- Special Saturdays: Ang Mo Kio 11A-13P / 2T; Bedok North 7A-8P (24 buses)
- Special Sundays: Ang Mo Kio 9A-11P / 3S / 3T; Bedok North 6A-7P (25 buses)
| Service 21 duty allocation
|
| Ang Mo Kio
|
Weekdays
(12A-12P / 7S / 2T)
|
| A/P
|
SBS3158K, SBS3186D, SBS3847E, SBS3904Z, SBS5023C, SBS6014Y, SBS6624L, SG5116E, SG6222A, SG6223Y, SG6233T & SG6261L
|
| S
|
SBS8245J, SBS8280G, SBS8287M, SBS8289H, SBS8816L, SG5118A & SG5536B
|
| T
|
SBS8823R & SBS8830U
|
Saturdays
(12A-15P / 1T)
|
| A/P
|
SBS5023C, SBS8287M, SBS3186D, SBS3847E, SBS3904Z, SG5116E, SG5118A, SG5536B, SG6222A, SG6223Y, SG6233T & SG6261L
|
| P
|
SBS8823R, SBS8816L, SBS8289H
|
| T
|
SBS3158K
|
Sundays & Public Holidays
(8A-10P / 2S / 6T)
|
| A/P
|
SBS3158K, SBS6014Y, SG6222A, SG6223Y, SG6233T, SBS3904Z, SBS6624L & SG6261L
|
| P
|
SBS3186D & SBS3847E
|
| S
|
SG5116E & SG5118A
|
| T
|
SBS3272M, SG5536B
|
| Bedok North
|
Weekdays
(7A-6P / 1S)
|
| A/P
|
SBS3013U, SBS7668D, SBS8179S, SBS8342L, SBS8532E & SG5023P
|
| A
|
SBS8322U
|
| S
|
SBS8667A
|
Saturdays
(7A-7P)
|
| A/P
|
SBS3013U, SBS7668D & SG5023P
|
Sundays & Public Holidays
(6A-7P)
|
| A/P
|
SBS3013U, SBS7668D & SG5023P
|
| P
|
Random
|
|
