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.

New Service Arrangements (from 20 Jul 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

COVID-19 Service Update:

  • Reduced frequencies and operating hours for ISB services
  • Implementation of capacity limits on buses


Number Bus Route
NUS A1 Prince George’s Park ↺ Kent Ridge Cres  (Loop, Counter-clockwise)
NUS A1E Lower Kent Ridge Road (Kent Ridge MRT) → Prince George’s Park
NUS A2 Prince George’s Park ↺ Kent Ridge Cres  (Loop, Clockwise)
NUS A2E Kent Ridge Drive (Ventus / Opp LT13) ↺ Lower Kent Ridge Road (Opp Kent Ridge MRT)
NUS B1 Kent Ridge Ter ⟶ NUS School of Business
NUS B2 NUS School of Business ⟶ Kent Ridge Ter
NUS C Kent Ridge Bus Terminal ↺ NUS Faculty of Science  (Loop)
NUS D1 NUS Business School ↺ University Town  (Loop)
NUS D2 Prince George’s Park ↺ University Town  (Loop)
NUS BTC Kent Ridge Ter ↺ NUS Bukit Timah Campus (Oei Tiong Ham Bldg)  (Loop)

Withdrawn Routes:

Number Bus Route
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)


Nearly all shuttle buses are fully-low-floor Volvo B9L buses. They 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.

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)

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