What else? Castle St would be a prime candidate to become a Living Street;
There's really no reason anyone needs to drive down Castle St if they don't live there. Instead of a standard, car-orientated road, it could be a pedestrian and bike corridor connecting the uni to the gardens. With a 1 lane road for essential traffic.
This is not without precedent in Ōtepoti, given what they've done with George St from the Octagon to Frederick St;
(7/?)