Williamtown.
Cost effective, apart from the fog
"The Hunter Valley successfully produces some of the thickest fog in the country.
It restricts drivers' vision dramatically especially in the autumn and winter.
Fog usually begins forming at midnight. On average 90 per cent of fog clouds lift by 9am."
Pea souper rolls in as Hunter pollution levels rise - Local News - News - General - Maitland Mercury
And the topography between Sydney and Newcastle would probably make a VFT prohibitively expensive.