well very generally speaking...
you need 100's of millions to build it, and you need to be in bed with the people awarding the contracts.
Then the government will go on about how it's not govt funded
Then a few hundred mill will be chipped in by the government promising victorians that after the tollway is paid for, tolls will cease
Also a second promise will be made that no roads will be blocked off to force drivers onto the tollway.
the projected repayment is usually somewhere between 10 and 20 years.
the road then opens for free for a month to get people hooked...
then roads are blocked off all over the city to force people onto the tollways.
oh, and 10 years later, after it's paid for.... you keep charging and increasing tolls.... and it's all profit from there on.