Trunk Services 100 - 109

!	TRAVEL ADVISORY					!
	From Sunday, 14 November 2024 to 31 October 2025, Train Services on the Bukit Panjang LRT will end an hour earlier at 22:30 every Thursday to Sunday (except Public Holidays). This is to facilitate the upgrading of the BPLRT signalling system, as well as the testing of the new and retrofitted Light Rail Vehicles (LRVs) on the BPLRT network. Please refer here for more information. From Saturday, 7 December 2024 to 10 December 2024. There will be no train service between Tampines station and Tanah Merah station with Simei station being closed. This is to prepare for the opening of the new East Coast Integrated Depot (ECID) in 2026, LTA and SMRT will be undertaking a series of works to facilitate the connection of tracks from the existing East–West Line to the ECID. Shuttle Buses will be operating at intervals of 5 mins. Please refer here for more information on the adjustments. here for Shuttle Bus and Train arrangements. here for the work map. From Tuesday, 10 December 2024, Punggol Coast station on the North East Line will open. Please refer here for more information. From Sunday, 24 November 2024, Bus Services 39 , 175 & 804 will call at new bus stops. Please refer here for more information. On Sunday, 24 November 2024, Bus Services 10 , 14 16 , 70M & 196 will be affected by road closure on Nicoll Highway from the First Bus to 10.00am. Please refer here for more information. From Monday, 25 November 2024, City Direct Service 674 will be introduced from Tengah Drive to the Central Business District (CBD), operating during morning and evening peak hours. Please refer here for more information. From Monday, 25 November 2024, City Direct Service 666 will be extended to Bayfront Avenue, Temasek Avenue, Temasek Boulevard and Raffles Boulevard. An additional trip will operate during morning peak period and its frequency will be improved from 15 minutes to 10 minutes. Please refer here for more information. From Sunday, 1 December 2024, Compassvale Bus Interchange will close following the opening of Buangkok Bus Interchange. Bus Services 110 , 114 & 156 will be amended to operate from Buangkok Bus Interchange while Bus Service 374 will be amended to operate from Sengkang Interchange. Please refer to the following for more information. From Sunday, 8 December 2024, Bus Services 84G & 84W will each call at an additional bus stop outside and opposite Blk 437B respectively. Please refer here for more information. From Monday, 9 December 2024, Supplementary Bus Service 298X will be introduced to provide a faster connection to the Tampines town centre and transport hub for residents in the Tampines North and west areas. Please refer here for more information.

Service 100

Direction 1	Direction 2	Depot(s)	Number of buses	Operator	Bus Package
Serangoon Interchange	Ghim Moh Terminal	Bukit Batok Depot (BBDEP) Hougang Depot (HGDEP)	31 Bukit Batok: 20 Hougang: 11		Clementi

Fleet
Bukit Batok Depot
SBS6104X SBS6152G SBS6176M SBS6194K SBS6206K SBS6242E SBS6645B SBS6738S SBS6739P SBS6833A SBS6835U SBS6861T 12 Mercedes-Benz O530 Citaro (6 Batch 1 / 6 Batch 2) SBS5228D SBS8137M SBS8150Z SBS8152T SBS8196S SBS8309J SBS8555P SBS8556L 8 Scania K230UB (7 Euro IV Batch 2 / 1 Euro V Batch 2)
Hougang Depot
SBS8557J SBS8558G SBS8560Z SBS8561X SBS8613E SBS8626T SBS8650Y SBS8651U SBS8652S SBS8705Z SBS8717P 11 Scania K230UB (4 Euro IV Batch 2 / 7 Euro V Batch 1)

Notes

2 Service 100 buses will perform one (1) down-route trip as Service 100 from Beach Road (Bus Stop 01411 - Opp St. John HQ) towards Serangoon Interchange before Weekdays AM Peak, departing at 0630 hours & 0639 hours. 6 Service 100 buses will perform supplementary trips as Short Trip 100A on Weekdays. Several Service 100 buses will perform down-route trips as Service 100 from Sims Avenue (Bus Stop 80051 - Aft Lor 1 Geylang) towards Serangoon Interchange during Weekdays PM Peak & PM Off-Peak, departing at 1819 hours, 1848 hours, 1907 hours, 1927 hours & 1942 hours. SBS6242E (Service 175) will perform sharebus trips on Service 100 on Weekdays. SBS8698K (Service 103) will perform crossover trips on Service 100 on Weekdays. 2 BBDEP Service 100 buses will operate on Service 48 on Weekends & Public Holidays. Several HGDEP Service 100 buses will operate on Service 109 on Weekends & Public Holidays. Weekdays: Bukit Batok 10A-10P / 9S / 1 TBC; Hougang 4A-5P / 5S / 1E (31 buses) Saturdays: Bukit Batok 7A-9P / 1S / 1T; Hougang 5A-5P / 1S / 1T (18 buses) Sundays & Public Holidays: Bukit Batok 7A-9P / 1T; Hougang 5A-5P / 1S (16 buses) Special Weekdays: Bukit Batok 10A-10P / 6S; Hougang 4A-3P / 3E / 5S / 1T (29 buses)

Short Trip 100A

Direction 1	Terminating at	Depot(s)	Number of buses	Operator	Bus Package
Serangoon Interchange	Aljunied Road (Aljunied Stn)	Bukit Batok Depot (BBDEP) Hougang Depot (HGDEP)	6 Bukit Batok: TBC Hougang: TBC		Clementi

Fleet
Bukit Batok Depot
Any Single-decker buses
Hougang Depot
Any Single-decker buses

Short Trip 100A departure times

Departing from Serangoon Interchange
Weekdays	06:29 07:13 07:53 08:08 08:59 17:41 18:06 18:28 18:44 19:00 19:13 19:37

Notes
6 Service 100 buses will perform supplementary trips as Short Trip 100A on Weekdays.

Service 101

Direction 1	Looping at	Depot	Number of buses	Operator	Bus Package
Serangoon Interchange	Buangkok Crescent	Hougang Depot (HGDEP)	12		Serangoon – Eunos

Fleet
SBS6087L SBS6098E SBS6128C SBS6129A SBS6605S SBS6636C SBS6823D 7 Mercedes-Benz O530 Citaro (4 Batch 1 / 3 Batch 2) SBS8542B SBS8885L SBS8972T 3 Scania K230UB (1 Euro IV Batch 2 / 2 Euro V Batch 1) SBS3052G SBS3704J 2 Volvo B9TL (1 WEG2 Batch 2 / 1 WEG2 Batch 3)

Notes

1 Service 101 SD will perform one (1) down-route trip as Service 101 from Upper Serangoon Road (Bus Stop 63031 - Kovan Stn Exit B) towards Serangoon Interchange via Buangkok Crescent before Daily AM Peak, departing at 0515 hours. 3 Service 101 SDs (Duty 81A/84P, Duty 82A/85P & Duty 83A/86P) practise overnight parking at Serangoon Interchange. Weekdays & Weekdays Sch Hols: 7A-8P / 4S (12 buses) Weekends & Public Holidays: 7A-7P / 1T (8 buses) Special Weekdays: 6A-4P / 4S / 1T (12 buses) Service 101 duty allocation Weekdays (6A-7P / 5S) A/P SBS6087L, SBS6098E, SBS6128C, SBS6129A, SBS6636C & SBS6823D P SBS8542B S SBS3052G, SBS3704J, SBS6605S, SBS8885L & SBS8972T Weekends & Public Holidays (7A-7P / 1T) A/P SBS6087L, SBS6098E, SBS6605S & SBS8972T T TBC

Service 102

Direction 1	Looping at	Depot	Number of buses	Operator	Bus Package
Hougang Central Interchange	Seletar Aerospace Avenue	Hougang Depot (HGDEP)	TBC		Sengkang – Hougang

Fleet
SG1853L 1 MAN NL323F (1 Euro VI) SBS6004B SBS6137B SBS6874G 3 Mercedes-Benz O530 Citaro (2 Batch 1 / 1 Batch 3) SG5955A 1 MAN ND323F (1 Euro VI Batch 1) SBS3003Z SBS3004X SBS3050L SBS3246P SBS3710R SBS3718U SBS3720L SBS3752U SBS3765H SBS3824X SG5324X 11 Volvo B9TL (3 WEG2 Batch 2 / 7 WEG2 Batch 3 / 1 WEG2 Batch 4)

Notes

1 Service 102 SD will perform one (1) crossover trip on Service 27 during Weekdays AM Peak, departing Hougang Central Interchange at 0806 hours. 1 Service 102 bus will perform supplementary trips as Short Trip 102A during Weekdays PM Peak, departing Sengkang East Way (Bus Stop 67409 - Sengkang Stn) between 1800 hours & 1932 hours. 2 Service 102 buses will perform supplementary trips as Short Trip 102B during Weekdays AM Peak, departing Sengkang West Way (Bus Stop 67999 - Blk 461B) between 0650 hours & 0830 hours. Several Service 102 buses will perform one (1) down-route trip as Service 102 from Jalan Kayu (Bus Stop 68119 - Aft Seletar Camp G) towards Hougang Central Interchange before Daily AM Peak: Weekdays: Departing between 0550 hours & 0632 hours. Saturdays: Departing between 0550 hours & 0628 hours. Sundays & Public Holidays: Departing between 0550 hours & 0623 hours. SBS8992K (Spare Bus) will operate on Service 102 on Weekends & Public Holidays. SG5955A (Service 102) will perform share bus trips on Service 89 on Weekdays. Several Service 102 buses practise overnight parking at Hougang Central Interchange. This service is introduced under Land Transport Authority (LTA)'s Bus Service Enhancement Programme (BSEP). This service practices jumpbus.

Short Trip 102A

Direction 1	Terminating at	Depot	Number of buses	Operator	Bus Package
Sengkang East Way (Sengkang Stn)	Sengkang West Way (Opp Blk 461B)	Hougang Depot (HGDEP)	2		Sengkang – Hougang

Fleet
SG6208S 1 MAN ND323F (1 Euro VI Batch 2) Any Service 102 bus

Short Trip 102A departure times

Departing from Sengkang East Way (Sengkang Stn)
Weekdays	18:00 to 19:32

Notes
1 Service 102 bus will perform supplementary trips as Short Trip 102A during Weekdays PM Peak, departing Sengkang East Way (Bus Stop 67409 - Sengkang Stn) between 1800 hours & 1932 hours. SG6208S (City Direct 671) will perform supplementary trips as Short Trip 102A during Weekdays PM Peak, departing Sengkang East Way (Bus Stop 67409 - Sengkang Stn) between 1800 hours & 1932 hours.

Short Trip 102B

Direction 1	Terminating at	Depot	Number of buses	Operator	Bus Package
Sengkang West Way (Blk 461B)	Sengkang East Way (Opp Sengkang Stn/Blk 260A)	Hougang Depot (HGDEP)	2		Sengkang – Hougang

Fleet
Any Single-decker & Double-decker buses

Short Trip 102B departure times

Departing from Sengkang West Way (Blk 461B)
Weekdays	06:50 to 08:30

Notes
2 Service 102 buses will perform supplementary trips as Short Trip 102B during Weekdays AM Peak, departing Sengkang West Way (Bus Stop 67999 - Blk 461B) between 0650 hours & 0830 hours.

Service 103

Direction 1	Direction 2	Depot	Number of buses	Operator	Bus Package
Serangoon Interchange	Yishun Interchange	Hougang Depot (HGDEP)	14		Serangoon – Eunos

Fleet
SBS6608J SBS6767H SBS6768E SBS6789U SBS6790P SBS6848H 6 Mercedes-Benz O530 Citaro (6 Batch 2) SBS5233M SBS8136R SBS8303A SBS8680K SBS8681H SBS8698K 6 Scania K230UB (2 Euro IV Batch 2 / 3 Euro V Batch 1 / 1 Euro V Batch 2) SBS3215D SBS3686C 2 Volvo B9TL (1 WEG2 Batch 2 / 1 WEG2 Batch 3)

Notes

1 Service 103 SD will perform one (1) down-route trip as Service 103 from Jalan Kayu (Bus Stop 68111 - Bef Seletar Camp G) towards Yishun Interchange before Weekdays AM Peak, departing at 0600 hours. SBS8698K (Service 103) will perform crossover trips on Service 100 on Weekdays. 2 Service 103 SDs will perform one (1) down-route trip as Service 103 from Jalan Kayu (Bus Stop 68119 - Aft Seletar Camp G) towards Serangoon Interchange before Sundays & Public Holidays AM Peak, departing at 0550 hours & 0605 hours. 2 Service 103 SDs will perform one (1) down-route trip as Service 103 from Yio Chu Kang Road (Bus Stop 63181 - Bef St. Helier's Ave) towards Yishun Interchange before Weekdays AM Peak, departing at 0550 hours & 0600 hours. 2 Service 103 SDs will perform one (1) down-route trip as Service 103 from Jalan Kayu (Bus Stop 68111 - Bef Seletar Camp G) towards Yishun Interchange before Weekends & Public Holidays AM Peak: Saturdays: Departing at 0600 hours & 0613 hours. Sundays & Public Holidays: Departing at 0600 hours & 0611 hours. 4 Service 103 SDs will perform one (1) down-route trip as Service 103 from Jalan Kayu (Bus Stop 68119 - Aft Seletar Camp G) towards Serangoon Interchange before Saturdays AM Peak, departing at 0530 hours, 0542 hours, 0554 hours & 0606 hours. 5 Service 103 SDs will perform one (1) down-route trip as Service 103 from Jalan Kayu (Bus Stop 68119 - Aft Seletar Camp G) towards Serangoon Interchange before Weekdays AM Peak, departing at 0530 hours, 0540 hours, 0550 hours, 0600 hours & 0610 hours. SBS3215D (Service 103) will perform one (1) down-route trip as Service 103 from West Camp Road (Bus Stop 68159 - Aft Shell Aviation) towards Serangoon Interchange before Daily AM Peak, departing at 0610 hours. Full SD fleet on Weekends & Public Holidays. This service is extended under Land Transport Authority (LTA)'s Bus Service Enhancement Programme (BSEP). Weekdays: 9A-9P / 4S / 1E (14 buses) Saturdays: 9A-10P / 1S / 1E / 2T (14 buses) Sundays & Public Holidays: 10A-15P / 1T (16 buses) Special Weekdays: 10A-10P / 4S (14 buses)

Service 105

Direction 1	Direction 2	Depot(s)	Number of buses	Operator	Bus Package
Serangoon Interchange	Jurong East Interchange	Ulu Pandan Depot (UPDEP) Hougang Depot (HGDEP)	26 Ulu Pandan: 21 Hougang: 5		Serangoon – Eunos

Fleet
Ulu Pandan Depot
SBS6669H SBS6698Z SBS6762X 3 Mercedes-Benz O530 Citaro (3 Batch 2) SBS8111L SBS8125Y SBS8140C SBS8327G SBS8572P SBS8573L SBS8707T SBS8769P SBS8886J SBS8887G SBS8906K SBS8929U SBS8935B SBS8937X SBS8938T SBS8940K 16 Scania K230UB (2 Euro IV Batch 1 / 2 Euro IV Batch 2 / 12 Euro V Batch 1)
Hougang Depot
SBS8216T SBS8315R SBS8655J SBS8980U SBS8981S 5 Scania K230UB (2 Euro IV Batch 2 / 2 Euro V Batch 1)

Notes

2 missing UPDEP buses. Several UPDEP Service 105 buses will perform down-route trips as Service 105 from Toh Guan Road (Bus Stop 28659 - IMM Bldg) towards Jurong East Interchange before Weekdays AM Peak, departing at 0600 hours, 0612 hours, 0624 hours, 0636 hours & 0648 hours. SBS8216T, SBS8655J & SBS8980U (Service 105) will perform down-route trips as Service 105 from Serangoon Avenue 3 (Bus Stop 66391 - Lor Chuan Stn Exit A) towards Serangoon Interchange before & during Daily AM Peak. SBS8327G (Service 105) will perform one (1) down-route trip as Service 105 from Scotts Road (Bus Stop 09219 - Far East Plaza) towards Jurong East Interchange during Weekdays AM Off-Peak, departing at 1613 hours. SBS8315R (Service 105) & 1 Service 105 bus will perform one (1) down-route trip as Service 105 from Lorong 2 Toa Payoh (Bus Stop 52181 - Opp Toa Payoh Stn) towards Serangoon Interchange before & during Weekdays AM Peak, departing at 0625 hours & 0637 hours respectively. SBS8940K (Service 105) & 2 UPDEP Service 105 buses will perform one (1) supplementary trip as Short Trip 105B during Weekdays AM Peak. Weekdays: Departing at 0610 hours, 0619 hours & 0628 hours. Saturdays: Departing at 0610 hours, 0625 hours & 0640 hours. Sundays & Public Holidays: Departing at 0610 hours, 0624 hours & 0639 hours. Weekdays: Ulu Pandan 15A-15P / 6S; Hougang 4A-4P / 1S (26 buses) Weekdays Sch Hols: Ulu Pandan 15A-15P / 7S; Hougang 4A-3P / 1S (27 buses) Saturdays: Ulu Pandan 13A-15P / 2T; Hougang 1A-1P / 1T (19 buses) Sundays & Public Holidays: Ulu Pandan 11A-12P / 3T; Hougang 4A-4P (19 buses) Special Weekdays: Ulu Pandan 15A-14P / 6S; Hougang 5A-4P / 1S (26 buses)

Short Trip 105B

Direction 1	Terminating at	Depot	Number of buses	Operator	Bus Package
Jurong East Interchange	Commonwealth Avenue West (Clementi Stn Exit B)	Ulu Pandan Depot (UPDEP)	3		Serangoon – Eunos

Fleet
SBS8940K 1 Scania K230UB (1 Euro V Batch 1) Any Single-decker buses

Short Trip 105B departure times

Departing from Jurong East Interchange
Weekdays	06:53 07:07 07:21

Notes
SBS8940K (Service 105) & 2 UPDEP Service 105 buses will perform one (1) supplementary trip as Short Trip 105B during Weekdays AM Peak.

Service 106

Refer to Bus Service 106 for more information.

Service 107 / 107M

	Direction 1	Direction 2	Depot	Number of buses	Operator	Bus Package
107	Hougang Central Interchange	Shenton Way Terminal	Hougang Depot (HGDEP)	19		Sengkang – Hougang
		Looping at
107M		Raffles Boulevard

Fleet
SBS6225E SBS6702U SBS6712R SBS6714K SBS6727Z SBS6746T SBS6757L SBS6804J SBS6841B SBS6845R 10 Mercedes-Benz O530 Citaro (1 Batch 1 / 9 Batch 2) SBS8283Z 1 Scania K230UB (1 Euro IV Batch 2) SG6342L SG6354C SG6356Y SG6358S 4 Alexander Dennis Enviro500 (4 3-Door) SBS3835P SBS3948Y SBS3952J SG5566P 4 Volvo B9TL (3 WEG2 Batch 3 / 1 WEG2 Batch 4)

Notes

SG5566P (Service 107) will perform one (1) crossover trip on Service 161 during Weekdays AM Peak, departing Hougang Central Interchange at 0610 hours. one (1) crossover trip on Service 161 during Weekdays AM Peak, departing Woodlands Interchange at 0700 hours. 3 Service 107M buses will perform one (1) down-route trip as Service 107M from Raffles Boulevard (Bus Stop 02089 - Promenade Stn/Pan Pacific) towards Hougang Central Interchange during Saturdays AM Off-Peak, departing at 1425 hours, 1447 hours & 1501 hours. 4 Service 107M buses will perform one (1) down-route trip as Service 107M from Raffles Boulevard (Bus Stop 02089 - Promenade Stn/Pan Pacific) towards Hougang Central Interchange during Weekdays PM Off-Peak, departing at 2010 hours, 2026 hours, 2051 hours & 2102 hours. Service 107 only operates on Weekdays & Saturdays. Operating hours are the same as Saturday's if the eves of Christmas, New Year & Lunar New Year fall on a Weekday. Weekdays: 8A-9P / 9S / 1E / 1T (19 buses) Saturdays & Eve of Public Holidays: 11A-11P / 1T (12 buses) Sundays & Public Holidays: 7A-8P / 1S / 1T (10 buses)

Service 109

Direction 1	Direction 2	Depot	Number of buses	Operator	Bus Package
Serangoon Interchange	Changi Village Terminal	Hougang Depot (HGDEP)	23		Serangoon – Eunos

Fleet

SBS6065A SBS6090B SBS6135G SBS6157T SBS6208E SBS6252B SG1240E 7 Mercedes-Benz O530 Citaro (6 Batch 1 / 1 Batch 3) SBS8233T SBS8301E SBS8539L SBS8653P SBS8708R 5 Scania K230UB (3 Euro IV Batch 2 / 2 Euro V Batch 1) SBS3055Z SBS3060H SBS3082U SBS3139R SBS3157M SBS3602U SBS3684H SBS3871J SBS3951L SBS7623H SBS7702M SG5515L 12 Volvo B9TL (1 WEG2 Batch 1 / 6 WEG2 Batch 2 / 4 WEG2 Batch 3 / 1 WEG2 Batch 4)

Notes

1 extra bus. 1 Service 27 SD will perform one (1) crossover trip on Service 109 on Weekdays AM Peak, departing Changi Village Terminal at 0630 hours. 1 Service 109 bus will perform one (1) down-route trip as Service 109 from Hougang Avenue 4 (Bus Stop 64619 - Opp Blk 913) towards Serangoon Interchange during Weekdays AM Peak, departing 0733 hours. 1 Service 109 SD will perform sharebus trips on Service 27 during Weekdays. 3 Service 109 buses will perform one (1) down-route trip as Service 109 from Buangkok Green (Bus Stop 64621 - Blk 565) towards Serangoon Interchange before & during Weekdays AM Peak, departing 0616 hours, 0638 hours & 0656 hours. SBS3060H (Service 109) will perform one (1) supplementary trip as Short-Trip 109A during Weekdays PM Peak, departing Serangoon Interchange at 1934 hours. SBS3157M (Service 109) will perform three (3) crossover trips on Short-Trip 109A during Weekdays PM Peak, departing Serangoon Interchange at 1824 hours, 1918 hours & 2003 hours. SBS3951L (Service 109) will perform one (1) down-route trip as Service 109 from Pasir Ris Drive 3 (Bus Stop 98101 - Loyang Pt) towards Serangoon Interchange before Weekdays AM Peak, departing 0555 hours. SBS8539L (Service 109) will perform two (2) supplementary trips as Short-Trip 109A during Weekdays PM Peak, departing Serangoon Interchange at 1806 hours & 1900 hours. SG1240E (Service 109) will perform three (3) crossover trips on Short-Trip 109A during Weekdays PM Peak, departing Serangoon Interchange at 1748 hours, 1842 hours & 1948 hours. SBS7702M (Service 109) will perform sharebus trips on Service 89 during Weekdays and Saturdays PM Peak. SG5515L (Service 109) will operate on Service 80 on Weekends & Public Holidays. Several Service 109 SDs will perform down-route trips as Service 109 from Boundary Road (Bus Stop 66059 - Blk 257A) towards Serangoon Interchange before & during Daily AM Peak & Weekdays AM Off-Peak. Weekdays: Departing between 0530 hours & 0903 hours. Saturdays: Departing between 0545 hours & 0645 hours. Sundays & Public Holidays: Departing between 0545 hours & 0641 hours. Several HGDEP Service 100 SDs will operate on Service 109 on Weekends & Public Holidays. 1 Service 109 SD practise overnight parking at Serangoon Interchange. Weekdays: 15A-14P / 1E / 7S (23 buses) Saturdays: 11A-12P / 4T (16 buses) Sundays & Public Holidays: TBC (13 buses) Special Weekdays: TBC (19 buses) Service 109 duty allocation Weekdays (15A-14P / 1E / 7S) A/P SBS3055Z, SBS3060H, SBS3082U, SBS3139R, SBS3157M, SBS3871J, SBS3951L, SBS6090B, SBS6135G, SBS6157T, SBS6252B, SBS8233T, SBS8539L, SG1240E, SG5515L E SBS6208E S SBS3602U, SBS3684H, SBS7623H, SBS6065A, SBS8301E, SBS8653P & SBS8708R

Short Trip 109A

Direction 1	Terminating at	Depot	Number of buses	Operator	Bus Package
Serangoon Interchange	Hougang Avenue 4 (Blk 913)	Hougang Depot (HGDEP)	4		Serangoon – Eunos

Fleet
SG1240E 1 Mercedes-Benz O530 Citaro (1 Batch 3) SBS8539L 1 Scania K230UB (1 Euro IV Batch 2) SBS3060H SBS3157M 2 Volvo B9TL (2 WEG2 Batch 2)

Short Trip 109A departure times

Departing from Serangoon Interchange
Weekdays	17:48 18:06 18:24 18:42 19:00 19:18 19:34 19:48 20:03

Notes

SBS3060H (Service 109) will perform one (1) supplementary trip as Short-Trip 109A during Weekdays PM Peak, departing Serangoon Interchange at 1934 hours. SBS3157M (Service 109) will perform three (3) crossover trips on Short-Trip 109A during Weekdays PM Peak, departing Serangoon Interchange at 1824 hours, 1918 hours & 2003 hours. SBS8539L (Service 109) will perform two (2) supplementary trips as Short-Trip 109A during Weekdays PM Peak, departing Serangoon Interchange at 1806 hours & 1900 hours. SG1240E (Service 109) will perform three (3) crossover trips on Short-Trip 109A during Weekdays PM Peak, departing Serangoon Interchange at 1748 hours, 1842 hours & 1948 hours.