First of all, the railways are taking advantage of all of the information that's available out there. We also work closely with Canadian universities. The University of Alberta, for example, has a very good rail-focused research group. There is a lot of interaction between the University of Alberta's rail research people there and our network. We also work closely with our U.S. counterparts. There's a dedicated R and D and training facility in Boulder, Colorado, that allows all of our railways to test equipment, and to test equipment under different conditions. I am certainly very confident that no stone is being left unturned here by the railways.
In terms of the costs, I can't give you a specific number, but I can tell you that those costs are becoming increasingly significant. That's also part of ensuring that the railways are reinvesting back into those areas where we will have the best impact and the best ability to respond to those challenges.