Sydney Harbour Speed Boat Does Any One Know Exactly Where The Speed Cameras Are In The Sydney Harbour Tunnel?

Does any one know exactly where the Speed Cameras are in the Sydney Harbour Tunnel? - sydney harbour speed boat

I drove up to 80, and was not really concerntrating then looked, and I was 90 or so, when I worried demerit quickly reduced to 80K, but I'm happy about speeds in a double weekend.