It's difficult to give you a precise answer, but let me try to lay out at least some parameters.
We do have some recent examples of this kind of financing in Canada that have been quite successful. I should say that.
The cost would be driven essentially by two things. The first is the nature of the business relationship between the public and private party. Generally speaking, you would want the private party to take on all the operational obligations, and probably the forward obligations, perhaps not for further expansion of the system, but at least for maintenance of the system.
In a system as big and complex as just one of the corridors.... Let's pick a number of $20 billion, just for argument's sake--