Yara said..
Latest news is a proposed tunnel under Middle Harbour. Back in the 70s there was going to be a bridge from Middle Head? across to Seaforth. It was part of what is called the "Warringah Expressway " but was canned when the well healed landowners objected. Now they are objecting to dredging and tunnel vents.
Absolutely, gotta keep the riff raff out, it is after all the northern suburbs.