And just to get an idea of how much 18 billion is in comparison to the countrys road infrastructure budget...
This is the 7 year budget, btw not just 1 year
The Syndey harbour tunnel was built for just over half a billion ....
I don't care what anybody says 18,000,000,000 is just insanity.. If it is really that important to have this connection, just go over the top, or through the middle...It may be ugly but it will work and you can spend the money save on painting it pretty colours or putting up giant bird sculptures or some rubbish to hide its ugliness..An elevated road would also have the advantge of great city views despite the miserable people living in the shadows beneath...or better yet beuild more damn freeways to take people around the city, not everybody wants to drive through it....
Personally I don't care how ugly it is because I dont live there, and when i drove past i dont stop to look really...so why do my taxes have to pay for it.....I also dont want to be paying any more ridiculous tolls...it already costs me 20$ tolls to get home from the airport, do I save that in time or petrol...I doubt it , when it only takes me 20 minutes more to come down nepean hwy and with the money save I buy a little extra fuel and a 6 pack of beer..
So sorry melbourne but if this road is really THAT important...just go over the top, or plow through the middle.... I imagine it will cost maybe 10% of what this tunnel will...
relative link attached >>>
http://www.smh.com.au/business/if-you-thought-using-a-toll-road-was-costly-try-building-one-20140811-102i5o.html