Hi all,
I went for a drive to the Heathcote / Princes Hwy intersection after seeing that post. Only 2 signs were changed heading north on the Princes Highway to the intersection.
Strangely enough the sign on the opposite side still has A6.
I drove north towards Menai, and back to Heathcote Rd but no other mention of A11.
Perhaps the A/M 11 is seen as an alternate A/M 1 through Sydney.
The question remains where would the A6 / M6 go?
The M6 will be 4km for at least a decade.
The A1 / M1 will continue as it is.