Bus Service 21

!	TRAVEL ADVISORY (15/4/2025)					!
	From Sunday, 27 April 2025, Pasir Ris Bus Interchange will be relocated to the new Pasir Ris Integrated Transport Hub (ITH), which will be accessible via Pasir Ris Mall, Level 1. There is no change to existing bus routes and stopping points. Please refer here for more information. From Monday, 28 April 2025, supplementary bus service 21X will be introduced, operating from Saint Michael's Terminal and looping at Thomson Road. It will only operate during Weekday peak hours. Please refer here for more information.

Service 21
Route Information
Route	Pasir Ris Interchange ↔ Saint Michael's Terminal
Route Length	27.4 km (towards Saint Michael’s) 25.0 km (towards Pasir Ris)
Travelling Time	130 mins (2 h 10 mins)
Operator	(Bishan – Toa Payoh Bus Package)

SBS Transit Bus Service 21 is an inter-town service linking the residential estates of Pasir Ris, Tampines, Bedok, Geylang, Kallang, and Balestier (Novena subzone).

On sundays and public holidays, Short-Trip 21A supplements the high demand from Geylang to Kitchener Road.

This service serves Jalan Bahagia and Jalan Tentaram in both directions (towards Pasir Ris Interchange and towards Saint Michael’s Terminal). Commuters are to check the Electronic Display Signage (EDS) or Destination Signage Plates on the bus before boarding.

21

(towards Pasir Ris Interchange)

21

(towards Saint Michael’s Terminal)

Service Information

Bus Duty & Fleet

Service 21/21A

Depot	Fleet Size		Fleet
	21	21A
Hougang Depot (HGDEP)	21	4	10 Single Deckers	11 Double Deckers
			SBS6014Y SBS6624L Mercedes-Benz O530 Citaro SBS5023C SBS5109P SBS8280G SBS8287M SBS8289H SBS8816L SBS8823R SBS8830U Scania K230UB	SG6042C SG6222A SG6223Y SG6261L MAN ND323F SBS3158K SBS3186DA SBS3726X SBS3847E SBS3904Z SG5116E SG5118A Volvo B9TL
Bedok North Depot (BNDEP)	8	N/A	5 Single Deckers	3 Double Deckers
			SBS8179S SBS8230B SBS8532E SBS8662M SBS8667A Scania K230UB	SBS3013U SBS7668D SG5023P Volvo B9TL

Notes

Several random BNDEP DDs will operate on Service 21 on Weekends & Public Holidays. Several random HGDEP DDs will operate on Service 21 on Sundays & Public Holidays. Full DD fleet for BNDEP on Weekends & Public Holidays. Majority DD fleet for HGDEP on Sundays & Public Holidays. Weekdays: Hougang 12A-12P / 7S / 2T; Bedok North 7A-6P / 1S (29 buses) Saturdays: Hougang 12A-15P / 1T; Bedok North 7A-7P (23 buses) Sundays & Public Holidays: Hougang 8A-10P / 2S / 6T; Bedok North 6A-7P (25 buses) Special Weekdays: Hougang 12A-12P / 3E / 4S; Bedok North 6A-6P / 1E / 1T (28 buses) Special Saturdays: Hougang 11A-13P / 2T; Bedok North 7A-8P (24 buses) Special Sundays: Hougang 9A-11P / 3S / 3T; Bedok North 6A-7P (25 buses)

Service 21 duty allocation
Hougang
Weekdays (12A-12P / 7S / 2T)
	A/P	SBS3158K, SBS3186D, SBS3847E, SBS3904Z, SBS5023C, SBS6014Y, SBS6624L, SG5116E, SG6222A, SG6223Y & SG6261L
	S	SBS5109P, SBS8280G, SBS8287M, SBS8289H, SBS8816L & SG5118A
	T	SBS8823R & SBS8830U
Saturdays (12A-15P / 1T)
	A/P	SBS5023C, SBS8287M, SBS3158K, SBS3186D, SBS3726X, SBS3847E, SG5116E, SG5118A, SG6222A, SG6223Y & SG6261L
	P	SBS8823R
	T	Random DD
Sundays & Public Holidays (8A-10P / 2S / 6T)
	A/P	SBS3158K, SBS6014Y, SBS6624L, SG6222A, SG6223Y & SG6261L
	P	SBS3847E
	S	SG5116E
	T	SBS3186D
Bedok North
Weekdays (7A-6P / 1S)
	A/P	SBS3013U, SBS7668D, SBS8179S, SBS8532E, SBS8662M & SG5023P
	A	SBS8230B
	S	SBS8667A
Saturdays (7A-7P)
	A/P	SBS3013U, SBS7668D, SG5023P & 4 Random DDs
Sundays & Public Holidays (6A-7P)
	A/P	SBS3013U, SBS7668D, SG5023P & 3 Random DDs
	P	Random DD

Route Information

Frequency

Period	AM Peak (First Bus - 08:30)	AM Off Peak (08:31 - 16:59)	PM Peak (17:00 - 19:00)	PM Off Peak (19:01 - Last Bus)
towards Saint Michael’s	07 - 15 minutes	08 - 16 minutes	11 - 16 minutes	12 - 16 minutes
towards Pasir Ris	10 - 15 minutes	08 - 15 minutes	08 - 17 minutes	12 - 16 minutes

Special Departures

82069 Aft Lor 106 Changi Changi Rd → 52499 St. Michael's Ter Whampoa Rd Departure Time
Weekdays	05:55 (SG5116E) 06:12 (SBS8179S)
Saturdays	05:55 (SG6233T) 06:06 (SBS3013U)
Sundays & Public Holidays	05:55 (SBS3158K)

80089 Bef Lor 18 Geylang Geylang Rd → 52499 St. Michael's Ter Whampoa Rd Departure Time
Sundays & Public Holidays	17:51 (SBS3186D) 18:15 18:31

82061 Eunos Stn/Int Sims Ave → 77009 Pasir Ris Int Pasir Ris Dr 3 Departure Time
Weekdays	05:50 (SG6233T) 06:00 (SG6261L) 06:18 06:31

Short-Trip 21A

80089 Bef Lor 18 Geylang Geylang Rd → 07231 Bef Tai Hoe Hotel Kitchener Rd Departure Time
Sundays & Public Holidays	16:52 (SBS3186D) 17:11 (DD) 17:22 (DD) 17:42 (DD) 17:56

Direction 1 (Pasir Ris → Saint Michael’s)

[Show/Hide Full Route Details]

Bus Stops		Point of Interest	Weekdays		Saturdays		Suns / PHs
			First bus	Last bus	First bus	Last bus	First bus	Last bus
77009 Pasir Ris Int(Berth B1) Pasir Ris Dr 3		EW1 Pasir Ris Pasir Ris Mall Pasir Ris Town Park Whitesands Mall	05:30	00:00	05:30	00:00	05:30	00:00
78109 Downtown East Pasir Ris Dr 3		Downtown East	05:33	00:03	05:33	00:03	05:33	00:03
78081 Blk 467 Pasir Ris Dr 6			05:35	00:05	05:35	00:05	05:34	00:05
78071 Blk 446 Pasir Ris Dr 6			05:37	00:06	05:36	00:06	05:35	00:06
78069 Blk 442 Pasir Ris Dr 1			05:38	00:07	05:37	00:07	05:36	00:07
78031 Blk 191 Pasir Ris St 12			05:39	00:08	05:38	00:08	05:37	00:08
78181 Bef Blk 187 Pasir Ris St 11			05:40	00:08	05:38	00:08	05:37	00:08
78191 Aft Blk 182 Pasir Ris St 11			05:43	00:11	05:41	00:11	05:40	00:11
98099 Blk 269A Pasir Ris Dr 1			05:44	00:12	05:43	00:13	05:42	00:12
98019 Opp Blk 149A Loyang Ave			05:47	00:15	05:45	00:15	05:44	00:15
76249 Blk 370 Tampines Ave 7			05:52	00:19	05:50	00:20	05:49	00:19
76239 Blk 390 Tampines Ave 7			05:53	00:20	05:51	00:21	05:50	00:20
76229 Opp Tampines East Stn Tampines Ave 7		DT33 Tampines East	05:54	00:21	05:52	00:22	05:51	00:21
76219 Blk 230E Tampines Ave 7			05:55	00:22	05:53	00:23	05:52	00:21
76209 Blk 233 Tampines Ave 7			05:56	00:23	05:54	00:24	05:53	00:22
76149 Opp Tampines Stn/Int Tampines Ave 4		EW2 DT32 Tampines Tampines 1	05:58	00:24	05:56	00:25	05:54	00:23
76139 Opp Century Sq Tampines Ave 4		EW2 DT32 Tampines Century Square Tampines Mall	05:59	00:25	05:57	00:26	05:55	00:24
76069 Blk 147 Tampines Ave 5			06:01	00:27	05:59	00:27	05:57	00:26
75059 Bef Tampines West Stn Tampines Ave 1		DT31 Tampines West SAFRA Tampines	06:03	00:29	06:01	00:29	05:59	00:28
75069 Blk 960A Bedok Resvr Rd			06:05	00:31	06:03	00:31	06:02	00:30
75349 The Clearwater Condo Bedok Resvr Rd		Bedok Reservoir Park	06:06	00:32	06:04	00:32	06:03	00:31
84609 Waterfront Key Bedok Resvr Rd			06:07	00:33	06:05	00:33	06:04	00:32
84639 Aft Waterfront Waves Bedok Resvr Rd			06:08	00:33	06:06	00:33	06:04	00:32
84619 Waterfront Isle Bedok Resvr Rd			06:09	00:34	06:06	00:34	06:05	00:33
84629 Blk 716 Bedok Resvr Rd			06:10	00:34	06:07	00:34	06:05	00:33
84479 Blk 713 Bedok Resvr Rd			06:11	00:35	06:08	00:35	06:06	00:34
84469 Blk 703 Bedok Resvr Rd			06:12	00:36	06:09	00:36	06:07	00:35
84481 Aft Bedok Ind Pk C Bedok Resvr Rd			06:15	00:38	06:12	00:38	06:09	00:36
84491 Blk 629 Bedok Resvr Rd			06:16	00:39	06:13	00:39	06:10	00:37
72079 Blk 609 Bedok Resvr Rd			06:18	00:40	06:15	00:40	06:11	00:38
72069 Blk 121 Bedok Resvr Rd			06:19	00:41	06:16	00:41	06:12	00:39
72029 Opp Blk 646 Bedok Resvr Rd			06:20	00:42	06:17	00:42	06:13	00:40
72019 Opp Blk 322 Jln Eunos			06:22	00:43	06:19	00:43	06:14	00:41
83119 Opp Blk 16 Jln Eunos			06:25	00:45	06:21	00:45	06:16	00:43
83109 Opp Eunos Stn Jln Eunos		EW7 Eunos	06:25	00:46	06:22	00:46	06:17	00:43
82069 Aft Lor 106 Changi Changi Rd			05:55	00:48	05:55	00:48	05:55	00:45
82049 Joo Chiat Cplx Changi Rd		Geylang Serai Market	05:57	00:49	05:57	00:50	05:57	00:47
82029 Blk 14 Mkt/FC Geylang Rd			05:58	00:51	05:58	00:51	05:58	00:48
82109 City Plaza Geylang Rd		City Plaza KINEX Paya Lebar Quarter	05:59	00:52	05:59	00:52	05:59	00:49
81069 Opp Lor 39 Geylang Geylang Rd			06:01	00:52	06:00	00:53	06:01	00:50
81049 Aft Lor 34 Geylang Geylang Rd			06:02	00:54	06:01	00:54	06:02	00:51
81029 Aft Lor 28 Geylang Geylang Rd			06:03	00:54	06:02	00:55	06:03	00:52
80089 Bef Lor 18 Geylang Geylang Rd	21A		06:04	00:56	06:04	00:57	06:04	00:54
80069 Opp Mohd Salleh Mque Geylang Rd	21A		06:06	00:57	06:05	00:58	06:06	00:55
80049 Aft Sims Way Geylang Rd	21A		06:08	00:59	06:07	01:00	06:09	00:57
80101 Kallang Stn/Opp Blk 2C Lor 1 Geylang	21A	EW10 Kallang	06:08	01:00	06:08	01:01	06:08	00:58
60051 Opp Kallang Pl Boon Keng Rd	21A		06:11	01:02	06:11	01:04	06:10	01:01
60099 Bef Lavender St Bendemeer Rd	21A		06:13	01:04	06:13	01:06	06:12	01:03
07329 Hoa Nam Bldg Jln Besar	21A	ARC 380	06:14	01:05	06:14	01:07	06:13	01:04
07231 Bef Tai Hoe Hotel Kitchener Rd	21A	City Square Mall Mustafa Centre	06:16	01:07	06:16	01:09	06:16	01:06
07211 Aft Farrer Pk Stn Exit G S'goon Rd		NE8 Farrer Park City Square Mall	06:18	01:08	06:18	01:11	06:18	01:07
07221 Sri Vadapathira K Tp S'goon Rd			06:19	01:09	06:19	01:12	06:19	01:08
50249 S'pore Khalsa Assn Balestier Rd			06:21	01:11	06:21	01:13	06:21	01:09
50239 S'pore Indian Assn Balestier Rd			06:22	01:11	06:22	01:14	06:22	01:10
50129 Opp Natl Skin Ctr Moulmein Rd		Tan Tock Seng Hospial	06:24	01:13	06:25	01:16	06:25	01:11
50119 St. Joseph Instn Jnr Moulmein Rd			06:26	01:14	06:27	01:17	06:27	01:13
50031 Opp Novena Ch Thomson Rd		NS20 Novena	06:28	01:16	06:27	01:19	06:27	01:14
50041 Novena Lodge Thomson Rd			06:29	01:17	06:28	01:20	06:28	01:15
50161 Bef Jln Dusun Balestier Rd			06:32	01:18	06:30	01:22	06:30	01:16
50171 Zhongshan Mall Balestier Rd		Zhongshan Mall	06:33	01:19	06:32	01:23	06:32	01:17
50191 Bef Balestier Plaza Balestier Rd			06:35	01:20	06:33	01:24	06:33	01:18
50201 Shaw Plaza Balestier Rd		Shaw Plaza	06:36	01:21	06:34	01:24	06:34	01:19
50211 Opp Balestier Pt Balestier Rd			06:37	01:22	06:35	01:25	06:35	01:20
50991 Blk 82 Whampoa Dr			06:38	01:23	06:38	01:27	06:36	01:21
52129 Blk 29 Jln Bahagia 1 21(towards St. Michael’s Ter)			06:40	01:24	06:40	01:28	06:39	01:22
52049 Blk 19 Jln Tenteram 1 21(towards St. Michael’s Ter)			06:41	01:25	06:41	01:29	06:40	01:23
52119 Opp Blk 65 Jln Tenteram 1 21(towards St. Michael’s Ter)			06:43	01:27	06:43	01:31	06:42	01:25
52499 St. Michael's Ter(Berth B1) Whampoa Rd			06:45	01:28	06:46	01:32	06:42	01:26

Notes:

• ¹: This service calls at this stop in both directions (towards Pasir Ris and towards Saint Michael’s). Commuters are to check the bus destination signage before boarding.
• 06:00: Underlined times indicate that the first bus is a downroute bus rather than one starting from the first stop.

Direction 2 (Saint Michael’s → Pasir Ris)

[Show/Hide Full Route Details]

Bus Stops	Point of Interest	Weekdays		Saturdays		Suns / PHs
		First bus	Last bus	First bus	Last bus	First bus	Last bus
52499 St. Michael's Ter(Berth B1) Whampoa Rd		05:30	00:00	05:30	00:00	05:30	00:00
52451 Blk 114 Whampoa Rd		05:31	00:01	05:31	00:01	05:31	00:01
52129 Blk 29 Jln Bahagia 1 21(towards Pasir Ris Int)		05:32	00:02	05:32	00:02	05:32	00:02
52049 Blk 19 Jln Tenteram 1 21(towards Pasir Ris Int)		05:33	00:03	05:33	00:03	05:33	00:03
52119 Opp Blk 65 Jln Tenteram 1 21(towards Pasir Ris Int)		05:35	00:04	05:35	00:05	05:35	00:05
52099 Opp NKF Kim Keat Rd		05:36	00:05	05:36	00:06	05:36	00:06
50159 Bef Kim Keat Lane Kim Keat Rd		05:37	00:06	05:37	00:07	05:37	00:07
50209 Aft Pegu Rd Balestier Rd		05:38	00:07	05:38	00:08	05:38	00:08
50199 Opp Shaw Plaza Balestier Rd	Shaw Plaza	05:38	00:07	05:39	00:08	05:39	00:08
50189 Opp Public Mansion Balestier Rd		05:39	00:08	05:40	00:09	05:40	00:09
50179 Opp Zhongshan Mall Balestier Rd	Zhongshan Mall	05:40	00:09	05:41	00:10	05:41	00:10
50169 Aft Irrawaddy Rd Balestier Rd		05:41	00:10	05:42	00:11	05:42	00:11
50059 Opp Thomson Med Ctr Thomson Rd		05:43	00:12	05:43	00:13	05:43	00:13
50049 Opp Novena Lodge Thomson Rd		05:43	00:12	05:44	00:13	05:44	00:13
50038 Novena Stn Thomson Rd	NS20 Novena Velocity @ Novena Square Tan Tock Seng Hospital	05:45	00:14	05:46	00:15	05:46	00:15
50111 Revival Ctr Ch Moulmein Rd		05:47	00:15	05:47	00:16	05:47	00:16
50121 Natl Skin Ctr Moulmein Rd	Tan Tock Seng Hospial	05:48	00:16	05:49	00:17	05:49	00:17
50231 NorthLight Sch Balestier Rd		05:50	00:18	05:51	00:19	05:51	00:19
50331 Blk 122 Mcnair Rd		05:52	00:19	05:52	00:20	05:52	00:20
50349 Blk 107 Towner Rd		05:53	00:19	05:53	00:21	05:53	00:21
60199 Boon Keng Stn/Blk 22 Boon Keng Rd	NE9 Boon Keng	05:54	00:20	05:54	00:22	05:54	00:22
60059 Bef Kallang Pl Boon Keng Rd		05:56	00:22	05:56	00:24	05:56	00:24
80109 Opp Kallang Stn/Blk 2C Lor 1 Geylang	EW10 Kallang	05:59	00:24	05:59	00:26	05:59	00:26
80051 Aft Lor 1 Geylang Sims Ave		06:00	00:25	06:00	00:27	06:00	00:27
80071 Yi Xiu Fty Bldg Sims Ave		06:02	00:27	06:01	00:29	06:01	00:29
80091 Bef Lor 23 Geylang Sims Ave		06:07	00:30	06:05	00:32	06:06	00:32
81011 Aft Aljunied Stn Sims Ave	EW9 Aljunied	06:05	00:29	06:04	00:31	06:04	00:31
81031 Blk 134 Sims Ave		06:06	00:30	06:05	00:32	06:05	00:32
81051 Sims Ville Sims Ave		06:08	00:32	06:06	00:34	06:07	00:34
82011 Aft Paya Lebar Quarter Sims Ave	EW8 CC9 Paya Lebar Paya Lebar Quarter Singpost Centre	06:10	00:33	06:08	00:35	06:09	00:35
82032 Blk 416 Sims Ave	Geylang Serai Market	06:11	00:34	06:09	00:36	06:10	00:36
82061 Eunos Stn/Int Sims Ave	EW7 Eunos	05:50	00:36	06:11	00:38	06:12	00:38
83101 Eunos Stn Jln Eunos	EW7 Eunos	05:52	00:38	06:13	00:39	06:14	00:39
83111 Blk 17 Jln Eunos		05:53	00:39	06:14	00:40	06:15	00:40
72011 Blk 322 Jln Eunos		05:55	00:41	06:16	00:42	06:17	00:42
72021 Blk 646 Bedok Resvr Rd		05:57	00:42	06:17	00:43	06:19	00:43
72061 Blk 122 Bedok Resvr Rd		05:58	00:44	06:19	00:45	06:21	00:45
72071 Blk 133 Bedok Resvr Rd		05:59	00:45	06:20	00:46	06:22	00:46
84499 Blk 140 Bedok Resvr Rd		06:01	00:46	06:21	00:47	06:23	00:47
84489 Opp Bedok Ind Pk C Bedok Resvr Rd		06:03	00:48	06:23	00:49	06:25	00:49
84461 Opp Blk 701 Bedok Resvr Rd		06:05	00:50	06:24	00:50	06:27	00:50
84471 Blk 745 Bedok Resvr Rd		06:06	00:51	06:25	00:51	06:28	00:51
84621 Opp Blk 716 Bedok Resvr Rd		06:07	00:52	06:26	00:52	06:29	00:52
84611 Opp Waterfront Isle Bedok Resvr Rd		06:09	00:53	06:27	00:53	06:30	00:53
84631 Opp Waterfront Waves Bedok Resvr Rd		06:09	00:54	06:28	00:54	06:31	00:54
84601 Opp Waterfront Key Bedok Resvr Rd		06:10	00:54	06:28	00:54	06:31	00:54
75341 Opp The Clearwater Condo Bedok Resvr Rd	Bedok Reservoir Park	06:11	00:55	06:30	00:55	06:33	00:56
75061 Blk 954D Bedok Resvr Rd		06:13	00:56	06:31	00:56	06:34	00:57
75051 Tampines West Stn Exit B Tampines Ave 1	DT31 Tampines West SAFRA Tampines	06:14	00:58	06:33	00:58	06:36	00:59
76061 Blk 938 Tampines Ave 5		06:16	01:00	06:35	01:00	06:38	01:01
76131 UOB Tampines Ctr Tampines Ave 4	EW2 DT32 Tampines Century Square Tampines Mall	06:18	01:01	06:37	01:01	06:40	01:03
76141 Tampines Stn/Int Tampines Ave 4	EW2 DT32 Tampines Tampines 1	06:20	01:02	06:38	01:02	06:41	01:04
76201 Blk 423 Tampines Ave 7		06:23	01:04	06:40	01:04	06:43	01:06
76211 Blk 449 Tampines Ave 7		06:25	01:05	06:41	01:05	06:44	01:07
76221 Tampines East Stn Exit A Tampines Ave 7	DT33 Tampines East	06:26	01:06	06:42	01:06	06:45	01:08
76231 Opp Blk 390 Tampines Ave 7		06:29	01:08	06:44	01:08	06:46	01:09
76241 Blk 497D Tampines Ave 7		06:29	01:09	06:45	01:09	06:47	01:10
98011 Blk 149A Loyang Ave		06:32	01:12	06:48	01:12	06:50	01:13
98091 Blk 156 Pasir Ris Dr 1		06:34	01:14	06:50	01:13	06:51	01:14
78199 Opp White Sands Pr Sch Pasir Ris St 11		06:36	01:15	06:51	01:15	06:53	01:16
78189 Opp Blk 187 Pasir Ris St 11		06:38	01:17	06:53	01:16	06:54	01:17
78039 Blk 104 Pasir Ris St 12		06:39	01:17	06:53	01:17	06:55	01:18
78061 Blk 104 Pasir Ris Dr 1		06:39	01:18	06:54	01:17	06:55	01:18
78079 Blk 429 Pasir Ris Dr 6		06:41	01:20	06:56	01:18	06:56	01:19
78089 Blk 405 Pasir Ris Dr 6		06:44	01:22	06:58	01:20	06:58	01:21
78101 Opp Downtown East Pasir Ris Dr 3	Downtown East	06:46	01:24	07:00	01:22	07:00	01:23
77009 Pasir Ris Int(Alighting) Pasir Ris Dr 3	EW1 Pasir Ris Pasir Ris Mall Pasir Ris Town Park Whitesands Mall	06:50	01:27	07:03	01:25	07:03	01:26

Notes:

• ¹: This service calls at this stop in both directions (towards Pasir Ris and towards Saint Michael’s). Commuters are to check the bus destination signage before boarding.
• 06:00: Underlined times indicate that the first bus is a downroute bus rather than one starting from the first stop.

Historical Information

Operator	Route	Year	Date	Service changes
(Current) Known as prior to 1 November 2001	Pasir Ris ↔ Lor 1 Geylang	1992	29 November	Introduced between Pasir Ris Int and Lor 1 Geylang Ter under TransitLink Network Integration Exercise Phase 10.
	Pasir Ris ↔ Saint Michael’s	1993	23 May	Integrated with Service 4 and extended to St. Michael’s Ter under TransitLink Network Integration Exercise Phase 13.
		1994	TBC	Skips the bus stop outside Kallang Stn along Sims Ave.
		1999	TBC	Serves new pair of bus stops outside and opposite The Clearwater Condo along Bedok Reservoir Rd.
		2001	18 February	Serves new staggered bus stop outside Novena Stn along Thomson Rd, skipping the bus stop outside Novena Ch.
		2002	TBC	Serves new pair of bus stops opposite and between Blks 731 and 734 along Bedok Reservoir Rd.
		2003	21 June	Amended to ply Bendemeer Rd, Jln Besar, Kitchener Rd and Serangoon Rd under North East Line Rationalisation Phase 1.
		2004	27 April	Amended to ply Geylang Rd, Kallang Rd and Sims Ave towards St. Michael’s Ter with the temporary conversion of Lor 1 Geylang to one-way traffic.
			6 December	Amended to ply the reinstated Lor 1 Geylang towards St. Michael’s Ter, skipping Geylang Rd, Kallang Rd and Sims Ave.
		2006	26 June	Designated wheelchair-accessible bus service (WAB).
	21Pasir Ris ↔ St. Michael’s 21AGeylang Rd → Kitchener Rd	2014	25 May	21AIntroduced from Geylang Rd (Bef Lor 18 Geylang) to Kitchener Rd (Bef Tai Hoe Hotel) on Sundays and Public Holidays. Wheelchair-accessible bus service (WAB) at launch.
		2016	24 April	Amended to ply Jln Tenteram in both directions.
		2022	30 October	Temporarily amended to ply Pasir Ris St 11 and Pasir Ris St 12 with the partial closure of Pasir Ris Dr 1 to facilitate the construction of CR4 Pasir Ris East station on the Cross Island Line.
		2025	27 April	To be amended to Pasir Ris Integrated Transport Hub.

External Links

• SimplyGo eGuide
• Bus Service Route Map