One for Wellington users.

I am traveling north on Adelaide Road towards the Basin Reserve (past McDonalds on my left). As I turn left on to Rugby Street to go around the Basin Reserve, the two lanes suddenly become three.

I want to know who has right-of-way for the new magic middle lane.

I *think* the road markings indicate that the left-hand lane splits to become the new middle lane, so cars in the left-hand lane have right-of-way to choose either the left-hand or middle lane. But I've certainly witnessed driving to the contrary.

My usual approach is to just stick to the relevant outside lane, then change to the middle-lane later if I need it (no chances0. But I'm curious to know the actual rights and wrongs of this intersection.