NUS Internal Shuttle Bus

The NUS Internal Shuttle Bus (ISB) is a shuttle bus service within the Kent Ridge campus of the National University of Singapore (NUS). The shuttle buses are overseen by the Transport, Logistics and Car Park Department. ComfortDelGro Bus Pte Ltd runs the shuttle bus service with their own fleet of private buses and drivers over five main routes.

Buses Deployed:

The newer, low-entry Scania K230UB and low-floor Volvo B9L buses have orange NUS liveries and were brought in to replace the older blue 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.

COVID-19 Service Update:

  • Reduced frequencies ad 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)

Click on the route for individual articles containing more information.

Withdrawn Routes: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)

Fleet Information:

Active Fleet:

  • 2010 Scania K230UB (SC Auto) 12m
  • 2015 Volvo B9L (SC Auto) 11m

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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