Interswitching is not an efficient way to move traffic. To use the example of the air mode, we all know that a direct flight is always more efficient than a stopover, let's say, from Calgary to Toronto to Ottawa, or to Winnipeg in your case, for example.
Interswitching, to some degree, is similar to this. If I take the example of traffic that originates on CN and moves to Vancouver, we take the traffic on our lines and we move it all the way to Vancouver on our lines. If we have to interswitch the traffic, what happens is that the traffic originating on CN will be given to CP at an interchange, using CP equipment. CP brings us empty cars. We bring the empty cars to the origin. We bring the loaded cars to the interchange and then CP picks them up to move them to Vancouver.
In normal circumstances, our best estimate there is that you certainly have one to two days of transit time. At the scale of our operation, if you start increasing the transit times, you're cutting capacity—to the point you're making.
Grain is a good example, because more and more we're moving grain in unit trains, which are very efficient moves. We have very good commercial agreements with our customers on that. Frankly, we're—