SMRT Bus Service 991

SMRT Bus Service 991 is a trunk route operating from Bukit Batok Bus Interchange and Choa Chu Kang Bus Interchange, serving numerous housing estates via Bukit Batok, Bukit Gombak, Choa Chu Kang and Keat Hong.

Route Overview
Route	Bukit Batok Bus Interchange ↔ Choa Chu Kang Bus Interchange
Passes Through	Bt Batok St 11, Bt Batok West Ave 8, Bt Batok West Ave 5, Brickland Rd, Choa Chu Kang Ave 1, Keat Hong Link
Route Length	Towards Choa Chu Kang: 11.7 km						Towards Bukit Batok: 11.7 km
Travelling Time	41 – 50 mins
Operator Information
BCM Route Package	Choa Chu Kang–Bukit Panjang Bus Package
Current Operator	SMRT Buses Ltd
Current Depot	Kranji Bus Depot (KJDEP) Buses park at: Bulim Bus Depot (BUDEP)
Current Fleet	Single-deck & Double-deck buses
Operating Hours
Departure Times from Bukit Batok	Daily
	05:30 – 01:00
	After 00:00 – 01:00 daily, buses operate as Service 991A, terminating at Bukit Batok West Ave 3 (Princess E Pr Sch)
Departure Times from Choa Chu Kang	Weekdays				Saturdays & Sundays / Public Holidays
	05:30 – 00:55				05:45 – 00:55
	After 00:00 – 00:55 daily, buses operate as Service 991B, terminating at Choa Chu Kang Ave 1 (Opp Choa Chu Kang Mkt)
Operating Frequency
	6:30am–8.30am			8.31am–4.59pm			5.00pm–7.00pm			After 7.00pm
From Bukit Batok	8 – 11 mins			10 – 12 mins			7 – 9 mins			8 – 15 mins
From Choa Chu Kang	8 – 10 mins			9 – 11 mins			8 – 10 mins			8 – 15 mins
Fare Information
Fare	Charges regular distance fares

Bus Service 991 is a trunk service plying between Bukit Batok and Choa Chu Kang, connecting many residential estates around Bukit Batok, Bukit Gombak, Choa Chu Kang and Keat Hong with the transport nodes of Bukit Batok, Bukit Gombak and Choa Chu Kang MRT stations and their nearby amenities.

When initially introduced on 8 July 2018, Service 991 plied an interim routing from Bukit Batok Interchange and looping at Bukit Batok West Ave 5, mainly complementing Service 941 and 944 in serving new residential estates northwest of Bukit Batok with direct links to Bukit Batok MRT Station. Short Trip Service 991A was also introduced to cater to late-night residents heading home from Bukit Batok MRT.

Service 991 was later extended to Choa Chu Kang via Bukit Gombak MRT, Bukit Batok West Ave 5, Brickland Rd, Choa Chu Kang Ave 3 & Ave 1, and Keat Hong Link. Thereafter, it absorbed the route of Feeder Service 308 (withdrawn on the same day), via Choa Chu Kang Ave 1, Choa Chu Kang Drive and terminating at Choa Chu Kang Interchange. Short Trip Service 991B was also introduced to cater to late-night residents heading home from Choa Chu Kang MRT.

Service 991 serves residential estates and condominiums such as:

• Sky Vista @ Bukit Batok
• West Quarry @ Bukit Batok
• West Plains @ Bukit Batok
• West Edge @ Bukit Batok
• West Rock @ Bukit Batok
• West Valley @ Bukit Batok
• West Ridges @ Bukit Batok
• Le Quest
• Hong Kah Green
• The Maderiah
• Bukit Gombak Vista
• Goodview Gardens
• Sunshine Court
• Sunshine Gardens
• iNz Residence
• Keat Hong Pride
• Keat Hong Crest
• Keat Hong Axis
• Keat Hong Colours
• Keat Hong Quad
• Keat Hong Verge
• Keat Hong Mirage
• Sol Acres

Schools and community amenities served en route include:

• Club CSC @ Bukit Batok
• Bukit Batok Polyclinic
• Bukit Batok Wet Market & Hawker Centre
• Bukit Batok Presbyterian Church
• St. Lukes Hospital
• Princess Elizabeth Primary School
• Millennia Institute
• Dulwich College
• Bukit Gombak Sports Centre
• HomeTeamNS Bukit Batok
• Bukit Batok Driving Centre
• Bukit Batok Park
• Sunshine Place
• Keat Hong Shopping Centre
• Choa Chu Kang Market
• Keat Hong Community Centre

MRT / LRT Stations Served

• NS2 Bukit Batok
• NS3 Bukit Gombak
• NS4BP1 Choa Chu Kang

Special Departures

• Choa Chu Kang Ave 1 (Bef Choa Chu Kang Mkt) → Choa Chu Kang Int
  Weekdays: 05:30, 05:40 & 05:50
  Saturdays & Sundays / Public Holidays: 05:45
• Choa Chu Kang Ave 3 (Opp Blk 464) → Bukit Batok Int
  Weekdays Morning Peak Hours
• Bukit Batok West Ave 3 (Opp Princess E Pr Sch) → Bukit Batok Int
  Weekdays: 05:30, 05:38, 05:46 & 05:54
  Saturdays & Sundays / Public Holidays: 05:30, 05:41, 05:53 & 06:05
  

Short Trip Services

• Service 991A: Bukit Batok Int → Bukit Batok West Ave 3 (Princess E Pr Sch)
  Daily: 00:15, 00:30, 00:45 & 01:00
  
• Service 991B: Choa Chu Kang Int → Choa Chu Kang Ave 1 (Opp Choa Chu Kang Mkt)
  Weekdays: 00:17, 00:36 & 00:55
  Saturdays & Sundays / Public Holidays: 00:18, 00:36 & 00:55
• Service 991C: Choa Chu Kang Ave 3 (Opp Blk 464) → Bukit Batok West Ave 5 (Bt Gombak Stn)
  Weekdays: 06:10 – 08:52

Gallery:

Poster Gallery:

Operator History:

• 08 Jul 2018 – Present: SMRT Buses Ltd

The Bus Service Operating License (BSOL) for this route will be renewed in 2026 under the Choa Chu Kang–Bukit Panjang Bus Package.

History:

• 2018 (08 Jul): Introduced between Bt Batok Int and Bt Batok West Ave 5 (Loop). Wheelchair-accessible at launch
• 2018 (30 Sep): Integrated with Service 308 and extended to Choa Chu Kang Int
• 2018 (16 Dec): Amended to relocated Choa Chu Kang Int
• 2018 (23 Dec): Serves a new pair of bus stops outside Blk 485B & opposite Blk 485A along Brickland Road

Past Routings

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