NUS Internal Shuttle Bus A1 is an NUS Internal Shuttle Bus route within the National University of Singapore (Kent Ridge Campus). The route makes a counter-clockwise loop around the campus, via Kent Ridge Drive, Kent Ridge Crescent and Lower Kent Ridge Road.

NUS Internal Shuttle Bus A2 operates a similar route in the clockwise direction. An express variant, Shuttle Bus A1E, operates during the peak hours from 7:30am to 10:00am.

NUS A1

Kent Ridge Ter
↺ Kent Ridge MRT(Anti-clockwise) (Loop)

16009 Kent Ridge Ter Clementi Rd

LT 13 Kent Ridge Drive

AS 5 Kent Ridge Drive

COM 2 Computing Drive

BIZ 2 Business Link

Opp TCOMS Prince George's Park

Prince George's Park Terminal Prince George's Park

18331 Kent Ridge Stn Exit A/NUH CC24 Lower Kent Ridge Rd

18301 Lim Seng Tjoe Bldg (LT 27) Lower Kent Ridge Rd

18311 Blk S12 Lower Kent Ridge Rd

18321 Opp University Health Ctr Lower Kent Ridge Rd

16171 Yusof Ishak Hse Kent Ridge Cres

16181 Ctrl Lib Kent Ridge Cres

16009 Kent Ridge Ter Clementi Rd

Boarding and alighting are allowed at Prince George’s Park Terminal.

Technical Information
Route	Prince George’s Park Terminal ↺ Kent Ridge Crescent (Circular, Anti-clockwise)
Passes Through	Lower Kent Ridge Road, Kent Ridge Crescent, Kent Ridge Drive
Route Length	6.2 km
Travelling Time	25 mins
Operator Information
Current Operator	ComfortDelGro Bus Pte Ltd
Current Fleet	Volvo B9L single-deck buses
Departure Times from Prince George’s Park	0715hrs — 2300hrs (Weekdays & Saturdays) 0900hrs — 2300hrs (Sundays & Public Holidays)
Frequency	School Term	Vacation
Weekdays	0715—1000: 5—7 mins 1000—1200: 10—12 mins 1200—1400: 5—7 mins 1400—1700: 10—12 mins 1700—2000: 7—9 mins 2000—2300: 15 mins	0715—1000: 10—12 mins 1000—1200: 12—14 mins 1200—1400: 10—12 mins 1400—1700: 12—14 mins 1700—2000: 10—12 mins 2000—2300: 30 mins
Saturdays	0715—1900: 15 mins 1900—2300: 30 mins	0715—1900: 15 mins 1900—2300: 30 mins
Sundays	0900—2300: 30 mins	0900—2300: 30 mins