Blip counting does not distinguish between vehicles, a bus carrying sixty people is just two blips like a car carrying one person. However the students had recorded the types of vehicles - cars, buses or trucks. This data confirmed that the Taylor Square intersection was doing a good job in separating south-bound vehicles heading for Port Botany along Flinders and South Dowling Streets, from cars heading for garages in South Sydney. I did an informal count that confirmed that the volumes of traffic had increased since the last survey but the mix was much the same.
My submission was for a south-bound underpass under William Street between Palmer Street Wooloomolloo and Bourke Street and for a north-bound tunnel from the west side of Flinders Street to William Street and under William Street to Palmer Street, which would take traffic out of Crown Street. I pointed out that this was downhill and could have a steeper gradient so all the buildings between Bourke and Palmer Streets, Darlinghurst could be preserved.
|Traffic in Crown Street in 1970's|
The plan was in three stages: an underpass under William Street was stage one. Stage two was to extend this in a tunnel to Moore Park. Unfortunately a north-bound tunnel from Flinders Street to Palmer Street was Stage Three.
Stage one was built, but the volume of traffic that the Cahill Expressway could deliver would never justify the expense of twin tunnels and the other stages would never be built.
That all changed when a consortium of banks proposed to build a tunnel under Sydney Harbour using technology developed in Hong Kong.