From bus stop
Alight at Lim Seng Tjoe (LT27) bus stop (SBS bus stop no. 18301).
SBS no. 95 and NUS internal shuttle buses A1, BTC, D2 and K stops here.
Walk through this walkway.
Go all the way straight.
You will find LT 27, 28 and 29 here.
From S16 drop-off point
Walk through the side entrance to the science canteen.
Walk down the stairs.
You will be able to see lecture theatre 27, 28 and 29.