BTT Lane Discipline 3

Question 1

What is the correct lane position when driving straight through a roundabout?

Accepted Answer

Left lane to enter, signal left before your exit

Answer

For going straight through a roundabout, use the left lane to enter and signal left as you approach your exit to leave the roundabout.

Question 2

When turning left at a roundabout, which lane should you use?

Accepted Answer

The left lane — signal left on approach

Answer

For a left turn (first exit) at a roundabout, approach in the left lane and signal left as you enter the roundabout.

Question 3

When turning right at a roundabout, which lane should you enter?

Accepted Answer

Right lane — signal right, then signal left before exiting

Answer

For a right turn, enter the roundabout in the right lane signalling right. Switch to signalling left as you pass the exit before yours, then exit.

Question 4

What does a 'Keep Left' sign with a white arrow on a blue circular background mean?

Accepted Answer

All vehicles must keep to the left of the sign or obstacle

Answer

A 'Keep Left' sign instructs you to pass to the left of the sign or traffic island. It is a mandatory directional instruction.

Question 5

Two lanes are merging into one. Who has right of way?

Accepted Answer

Vehicles should take turns (zipper merge) when safe

Answer

When two lanes merge, drivers should cooperate using a zipper merge — alternating one vehicle at a time when safe to do so.

Singapore BTT Practice Test