Fleet Restrictions

Route limitations, sometimes called fleet restrictions, usually refer to bus services that have regulations on fleet deployments, such as vehicle length, vehicle height, or various environmental factors. Bus companies may also set their restrictions on the buses they deploy on certain routes.

Physical Limitations

Bus routes in Singapore are subject to physical limitations of road infrastructure. Some roads have various design limitations that would be difficult or impossible for larger buses to pass through. Hence, for safety reasons, fleet restrictions are put in place to forbid certain models of buses from being deployed on routes with limitations.

The following list is not exhaustive; nor does it reflect the most up-to-date restrictions in place, as bus operators are at liberty to add or remove such restrictions. More information in the disclaimer section below.

Bus Operator Bus Route Fleet Restriction Reasons
Central Region
SBST 73, 105, 159 Only single-decker buses allowed Low headroom at Braddell Flyover
SMRT 188R, 963R, NR1, NR6, RWS8 No bendy buses allowed Resorts World Sentosa Basement
Eastern Region
GAS / SBST 15, 150, 155 Only single-decker buses allowed Joo Chiat and Telok Kurau Road
SBST / SMRT / GAS 24, 27, 34, 36, 53, 110, 858 Only single-decker & articulated buses allowed Changi Airport PTB1/2/3 Basement
SBST 33 Only single-decker buses allowed Joo Chiat and Tembeling Road
SBST 42 Only single-decker buses allowed Fidelio Street, Lengkok Empat and Siglap Drive
SBST 401 Only single-decker buses allowed East Coast Park Service Road
GAS 403 Only single-decker buses allowed Pasir Ris Road
Northern Region
SBST / SMRT 138, 926, 927 Only single-decker buses allowed Mandai Lake Road
SMRT 825 Only single-decker buses allowed Lentor Estate
SMRT 925 / 925M No double-deck/bendy buses allowed Kranji Reservoir Carpark and Neo Tiew
North-East Region
GAS 84 Only single-decker buses allowed Punggol Road
Western Region
SBST 92, 92M Only single-decker buses allowed Mt Sinai
TTS 173 No double-deck buses allowed Lorong Kismis
SBST 200 Only single-decker buses allowed South Buona Vista Road
SBST 405 Only single-decker buses allowed Old CCK Road

Unconfirmed fleet restrictions

The so-called ‘ban’ on various types of buses is subject to debate. Since fleet restrictions are part of the internal affairs of bus companies and are not publicly disclosed, it is difficult to know for sure whether a ‘ban’ exists. For example, areas like Depot Road and Resorts World Sentosa do not see the use of double-deck buses and articulated buses respectively. It is hard to know for sure whether the ‘ban’ will be lifted, as the exclusive deployment of single-deck rigid buses to various bus services plying these areas may be due to other causes (like lack of strong demand). As such, most fleet restrictions are ‘guessed’ based on the operating trends of various services. And occasionally, fleet restrictions are ‘broken’, one example being the introduction of double decks to Service 90 and 94 which ply Airport Road in 2013, where only single-deck buses were previously deployed. Slightly before that, double-deck buses made their first appearance on Service 95, and subsequently Service 151 and 96, all of which serve Kent Ridge Crescent within NUS, known for its narrow roads and steep inclines.

For feeder bus routes, most routes use single-deck buses exclusively due to convenience; double-deck buses are slower at loading and unloading large numbers of passengers quickly. It is difficult to determine fleet restrictions exist regarding the ‘ban’ of double-decker buses and hence, feeder services are not included in the above table.

In addition to physical limitations, other restrictions like the wheelchair-accessible bus quota for wheelchair-accessible bus routes (WAB) which state that a WAB route must have a fleet of at least 50% wheelchair-accessible buses, so wheelchair-bound passengers can get a WAB within the waiting time of two buses. Another unique fleet restriction is the cross-border fleet restriction, which demands that all buses serving on cross-border routes have to be registered with the Malaysian authorities (more specifically, Malaysia’s Land Public Transport Commission or SPAD). These buses are refitted with a third brake light and carry additional documents/labels in order to meet Malaysian traffic regulations (3rd brake light is not compulsory in Singapore). These JB-registered buses can serve on any bus route, but only JB-registered buses can be deployed on cross-border routes.

Updates: Tree pruning works along Bukit Timah Road in Dec 2014 / Jan 2015 have allowed for double-deck buses on Services 48, 66, 67 and 960. Tree pruning works along Henderson Road in late 2014 have allowed for double-deck buses on Services 145 & 176.

SMRT Ang Mo Kio Depot was reconfigured to accommodate double-deck buses since August 2015.

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