Which vehicles are turning correctly at this roundabout?

Explanation: At a roundabout: Turning left: On your approach to a roundabout you must select the left lane, signal left, stay in the left lane to exit. Going straight ahead: Do not signal when approaching the roundabout but always signal left before exiting a roundabout. You may approach the roundabout from either left or right lanes (unless there are road markings with other instructions), drive in the same lane through the roundabout and exit in the same lane. Turning right: On your approach, to a roundabout you must select the right lane, signal right, stay in the right lane and signal left before exiting into the right lane.