NUS Internal Shuttle Bus

The NUS Internal Shuttle Bus (ISB) network serves the National University of Singapore (NUS)’s Kent Ridge Campus.

These shuttle buses are overseen by the Transport, Logistics and Car Park Department, under the Office of Campus Amenities (OCA). The shuttle bus service is contracted to private bus operator ComfortDelGro Bus Pte Ltd. The company owns, operates and maintains the fleet of buses, and manages the bus drivers.



No. Route Operating Hours
NUS A1 Kent Ridge Ter ↺ Prince George’s Park / Lower Kent Ridge Cres  (Loop, Counter-clockwise) Daily; full-day
NUS A2 Kent Ridge Ter ↺ Kent Ridge Cres / Prince George’s Park  (Loop, Clockwise) Daily; full-day
NUS D1 NUS COM 3 ↺ University Town  (Loop) Daily; full-day
NUS D2 NUS COM 3 ↺ University Town  (Loop) Daily; full-day
NUS BTC NUS Bukit Timah Campus (Oei Tiong Ham Bldg) ↺  Kent Vale  (Loop) Weekdays; full-day
NUS E University Town ↺ NUS School of Design & Environment  (Loop) Term Weekdays; daytime
NUS K Prince George’s Park ↺ University Town  (Loop) Term Weekdays & Sat; daytime
NUS L NUS Bukit Timah Campus (Oei Tiong Ham Bldg) ↺  Botanic Gardens MRT  (Loop) Daily; evenings only


Withdrawn Routes:

COVID-19 Service Arrangements (20 Jul 2020 — 5 Dec 2020):
NUS AA1 Prince George’s Park Terminal ↺ Kent Vale via Central Lib (Loop)
NUS AA2 Prince George’s Park Terminal ↺ Kent Vale via UTown (Loop)
NUS BB Prince George’s Park Terminal ↺ University Town (Loop)
NUS CC Opp Kent Ridge Stn Exit A ↺ UTown via COM2 (Loop)
NUS CCX Opp Kent Ridge Stn Exit A ↺ UTown (Express)
NUS DD NUS Bukit Timah Campus (Oei Tiong Ham Bldg) ↔ Kent Vale

During NUS’ AY2020/21 Semester 1 amid the COVID-19 pandemic, the ISB network was modified in line with NUS’ zoning strategy which minimised intermingling of students and staff across zones. Routes were amended such that each zone had a direct ISB service to Kent Ridge MRT station and other shared amenities within designated neutral zones (e.g. school accommodation, studios, sports facilities and student support facilities) subject to access restrictions.

Other Withdrawn Routes:
Number Bus Route
NUS A1E Lower Kent Ridge Road (Kent Ridge MRT) → Prince George’s Park
NUS A2E Kent Ridge Drive (Ventus / Opp LT13) ↺ Lower Kent Ridge Road (Opp Kent Ridge MRT)
Kent Ridge Ter ⟶ NUS School of Business (via UTown)
NUS B2 NUS School of Business ⟶ Kent Ridge Ter (via UTown)
NUS C Kent Ridge Ter ↺ NUS Faculty of Science  (Loop)
UT-CLB University Town ↔ Central Library
UT-FOS University Town ↔ Faculty of Science.
Replaced by 2018 amendment to NUS C
NUS P1 Kent Ridge MRT ↺ University Town (Loop)


Diesel Buses

Electric Buses

Nearly all shuttle buses are fully-low-floor Volvo B9L buses. These Euro V diesel buses bear the orange NUS livery and are fitted with a next-stop announcement system.

Both the low-entry Scania K230UB and low-floor Volvo B9L buses bear orange NUS liveries and were brought in to replace older, high-floor private buses. These newer buses are built in a city bus configuration for quick boarding and alighting of passengers. In addition, many of the buses have special liveries on various themes, e.g. Graduate Club, AlmuNUS, and various faculties of the University.

The shuttle bus fleet is expected to be fully electrified in the near future, with the first electric buses expected in 2022. For more details, see Electric Buses coming to NUS and NTU campuses | Land Transport Guru.

Retired Fleet:

  • Mitsubishi FUSO RK117
  • Mitsubishi FUSO RM117
  • Mitsubishi FUSO RM118
  • Mercedes Benz OF1318
  • Nissan Diesel SM215H
  • Nissan Diesel SM217L
  • Hino RK3HMKA
  • Isuzu LT133P
  • Mercedes Benz OF1318
  • Volvo B7R
  • Sunlong SLK6905 6.7m (2010)

Back to Shuttle Bus Services

2 thoughts on “NUS Internal Shuttle Bus

  • 26 August 2022 at 4:11 PM

    There is an upcoming BYD B12 electric bus for NUS shuttle later this year to replace Volvo B9Ls registered in 2015.

    • 21 April 2023 at 8:17 PM

      Only 10 BYD B12 buses, but also lots of Zhongtong N12


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