I don't think you're ever gonna see Chinese Pistachio as street trees as they are amongst the slowest growing things - although they are also amongst the most spectacular! We looked at one for our garden but the wait for it to become a descent shade tree meant the kids would have grown up and left home!
Plane trees are all over Adelaide's streets because they are safe street trees, in as much as they don't drop limbs and their roots don't do extensive damage to roads and underground pipes. There has been a fair bit of research done into street trees since the "Greening of Adelaide" started 10 or so years ago.
One important thing to remember with deciduous trees is that the leaves are a problem. Leaves from European trees end up in our waterways, and break down very quickly, unlike eucalyptus leaves. When they break down they change the toxicity levels in the water, and so are not good for native water life (fish, frogs, etc). A few years ago there was a proposal to make the owners of deciduous trees accountable for the removal of leaves. Councils were seen to be the owners of street trees, and were also to be held responsible for the leaves, a very important point as leaves from street trees are the ones most likely to end up floating down gutters and into the stormwater system. I don't know whether any of this was legislated or not. The problem was the extra cost to councils, which may mean that they shy away from planting street trees.
I would like to see every main road in adelaide lined with large street trees. I think they look best if they're not mixed up, but if a long stretch of road is planted with a similar type of tree. It shows the trees off really nicely. Some flowering eucalypts do well as street trees too. I really like the flowering ironbarks down the Parade in Norwood.
Two roads that could really do with planting are Richmond Road and Marion Road. They are URG-LEE!
