How to use a Flush Median

It’s alright to drive on a flush median for a short distance if you’re turning into or out of a side road or driveway. You can use them to slow down before making a right-hand turn, or to merge left into a gap in the traffic flow.

If you’re using the flush median to make a right-hand turn you should indicate, then steer gently onto the median rather than at an abrupt angle. Use the median as an area to slow down and brake. This way the following traffic doesn’t have to slow down rapidly to avoid you.

Carry out a similar manoeuvre if you’re using the flush median as a refuge before merging into traffic on your left. Remember to indicate and check your mirrors, accelerate, and move gently into a gap in the traffic.

When you’re using a flush median, always remember to watch out for pedestrians, other vehicles using the median and any raised islands.

When doing your restricted test in a rural area like Westgate or Pukekohe, for the high speed zone parts you are required to change lanes. 

When you see a sign saying "Passing Lanes Ahead, Keep Left Unless Passing"

The testing officer will tell you to, "please move into the right lane".

Just like before when ever you see you 2 lanes be prepared to change lanes.

Once you move into the right lane they you ask you to move over into the left lane.

Beware of vehicle that might try to overtake you on the left.

Penrose Restricted Test: 

You are required to change lanes on Ellerslie-Panmure Highway.

The speed limit is 50km.
The road is reasonably straight, but it's hilly and it's is really easy to go over 50km when it comes to changing lanes, specially when everyone else is going faster then 50km. 

Drive in a way that you are prepared to move into the right when ever you drive on a two lane roads.