City Direct Bus Service 684, operated by SMRT Buses, is a weekday peak-hour City Direct service connecting Keat Hong, Brickland and Bukit Batok West to the Central Business District (CBD). It is introduced under the Bus Connectivity Enhancement Programme (BCEP).
City Direct 684 will be launched on 15 June 2026.
| Route Overview | ||||||||||||
Route  |
[AM]: Keat Hong Link (Opp Blk 816A) → Marina Boulevard (Marina Bay Financial Ctr) [PM]: Central Boulevard (Marina Bay Stn) → Keat Hong Link (Blk 816B) |
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| Passes Through | Keat Hong Close, Brickland Rd, Bukit Batok Rd, Bukit Batok West Ave 8, Robinson Rd / Shenton Way | |||||||||||
| Route Length | Towards Marina Blvd: TBC | Towards Keat Hong Link: TBC | ||||||||||
| Travelling Time | TBC | |||||||||||
| Operator Information | ||||||||||||
| BCM Route Package | Choa Chu Kang–Bukit Panjang Bus Package | |||||||||||
| Current Operator | SMRT Buses Ltd | |||||||||||
| Current Depot | Gali Batu Bus Depot | |||||||||||
| Current Fleet | TBC | |||||||||||
| Operating Hours | ||||||||||||
| Departure Times from Keat Hong Link | Weekdays, except Public Holidays |
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| 07:30 – 07:45 | ||||||||||||
| Departure Times from Central Blvd |
Weekdays, except Public Holidays | |||||||||||
| 18:10 – 18:25 | ||||||||||||
| Operating Frequency | ||||||||||||
| From Keat Hong Link | 15 mins | |||||||||||
| From Central Blvd |
15 mins | |||||||||||
| Fare Information |
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| Fare | Charges express distance fares |
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Service 684 offers residents of Brickland and Bukit Batok West improved connectivity to the Central Business District via the AYE, providing a direct travel alternative to commuters who typically rely on the rail network and feeder buses.
Early Plans
Plans for this service were first mentioned by Acting Transport Minister Mr Jeffrey Siow on 8 June 2025, as a City Direct service from Brickland, to be launched by the end of 2026.
In an update on the BCEP released by the Land Transport Authority in February 2026, the service number was confirmed as 684, and was scheduled to be introduced ‘in the coming months’. The update included Bukit Batok West as a catchment area for the service. The route was officially announced on 7 May 2026.
MRT Stations Served
- EW15 Tanjong Pagar
- NS27CE2TE20 Marina Bay
- DT17 Downtown
- TE19 Shenton Way
Departure Timings:
Weekdays, except Public Holidays
- Morning Peak from Keat Hong Link (Opp Blk 816A):
07:30 & 07:45 - Evening Peak from Central Boulevard (Marina Bay Stn):
18:10 & 18:25
Poster Gallery:
Operator History:
- From 15 Jun 2026: SMRT Buses Ltd
Route History:
- 2026 (15 Jun): Introduced from Keat Hong Link (Opp Blk 816A) to Marina Blvd (Marina Bay Financial Ctr) during morning peak hours and from Ctrl Blvd (Marina Bay Stn) to Keat Hong Link (Blk 816B) during evening peak hours, as a City Direct bus service under the LTA’s Bus Connectivity Enhancement Programme (BCEP).
References:
- 2 new bus services in Tengah and Brickland by year-end, 6 more in 2026: Acting Transport Minister Jeffrey Siow – cna
- More Improvements Under the Bus Connectivity Enhancement Programme in 2026 – Land Transport Authority
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684 does indeed intrude into CCK, based on the bus stops shown in the Instagram Post by “Jeff”
The rough routing in the west outlined in his post is Keat Hong Close -> Brickland Rd -> BBT Rd -> BBT West Ave 8
Saw SMRT training buses along Somerset Road today, could be nothing could be 684 routing? If it does end up following the 68x routing anyway, would be real inconvenient for those working in Shenton Way, and also just strange given that 674 doesn’t follow routing of most of the other 67x to suntec
Correction:686:Choa chu kang Crescent-Bishan interchange to Lorong Halus
They Could renumber 991,991A,991B And 451 to 684,684A,684B and 684M respectively, And Probably introduce 685 and 686 to operate like: 685:Ang Mo Kio
Avenue 3-Choa Chu kang North 7 bi-directionally and 686:Choa chu kang Crescent-Bishan Interchange bi-directionally and That’s all; Bye!😘
What talking you? 6## series is only meant for City Direct. How can you allow a normal trunk bus service renumbered to 6## series??
Interesting, another “Brickland” service, with the area being mentioned vaguely. Presumably it’s the same “Brickland” that 984 serves, intruding into CCK instead of actually serving Tengah.
Bukit Batok West here might refer to the area around where the 99x services are routed. A blessing, since that area has a severe lack of connectivity to anywhere else but nearby MRT nodes.
By the looks of it 684 could be operated by SMRT given it’s proximity to both CCK Int & GBDEP. Entirely possible to interline from another SMRT service too. However… if LTA were to futureproof, 684 may as well end up under TTS since it’s targeted at Tengah, has it’s start/end point being quite close to Tengah Central, and is also nearby to the future TGDEP which is operated under Bulim Package.