Here are the next lot of pics,
In the first pic we're looking down the tunnel (cars exit the carpark this direction)
In the second pic you can see how a mezzanine level was added to fit more cars in.
The links:
http://tdu.to/Wynyard.tunnel.1.JPG
http://tdu.to/WynyardCarpark.view1.JPG
Enjoy!
Tim in Sydney.