These London Plane trees are growing out of a very narrow footpath in Madrid.
In Perth we'd say the space is too tight and plant some pissant little trees that do nothing.
Not here. Like everywhere in Europe, they plant large-growing species and then simply manipulate them into the shape they require.
Sure, you'd have to keep pruning these to keep them one-sided and leaning away from the buildings - but not that often. A quick tweak every few years would do it. No big deal. And it's a small price to pay for the superb amenity these trees are providing everyone: pedestrians, building owners and road users.
This is exactly how I envisaged the Planes in Bayview Tce, Claremont being managed when I specified them for that street. Eventually they will form a "gothic cathedral" over the road. Because we also used fairly close spacings it will be a superb effect.