This really depends on the period of the contract. I'm not very familiar with the public-private partnerships model, which is in place in Canada already, or what the plans are.
What you really need, as I said earlier, is a long-term vision here. Why do I have a rail system? What's the long-term plan? What should the schedule in the long term look like? Then, if you're using a private consortium to build and operate the system, you have to agree very early on regarding the long-term schedule.
What's the supply side in terms of intervals and the capacity you expect in 2030, 2040 and 2050? They have to be very clear. Then, on the same side, you have to be really careful to calculate very carefully how much capacity you need on the newbuild stretches as well as on the city access stretches. That's very important.
Let's say, if you have that—