Private enterprise built two of Sydney's motorways, the [M4|[link|http://en.wikipedia.org/wiki/M4_Western_Motorway|http://en.wikipedia...._Western_Motorway]] and the [M5|[link|http://en.wikipedia.org/wiki/M5_South_Western_Motorway|http://en.wikipedia...._Western_Motorway]]. Both require a toll, but the current Labor government when they were last in Opposition promised to remove the toll on the M5. When they got into government, they discovered they contractually couldn't. So instead, we have a CashBack scheme.
The second one was the [Cross-City Tunnel|[link|http://en.wikipedia.org/wiki/Cross_City_Tunnel|http://en.wikipedia....Cross_City_Tunnel]]. The contract issues between the road-builder and the state government made news items night after night, regarding things like road closures and and toll-price.
Wade.