crane lost its way

I was waiting for bus at Bukit Timah Road when a crane truck pulled over at the bus stop. The driver jumped out from his seat, walked towards the shelter, and approached me for direction -_-"

The instruction he had on a piece of paper was quite vague: Adam Road turn left, first traffic light turn right, 11 storey building, "Guan Ho".

According to the driver that's the name of a school, but I've never heard of it before, although I spent 4 years in a school in the area.

You know, ahem, not all landmarks are marked in the streets directory.