On the GPS train system, the motivation is first and foremost safety, and therefore, it's not an economic justification, per se.
The financial justification, if one needs one for a safety-related improvement, is twofold. It's a much more affordable substitution to positive train control. Positive train control is a signalling system that would cost billions of dollars to install across Canada, and this is a millions of dollars alternative. There's a huge return in terms of savings over the positive train control investment. The second element is that the system allows for better train handling, which means fuel economies, because the train handling is more efficient, and there are fewer accidents or rule violations. Where the train is immobilized because you've violated a rule, crews have to be changed, and the passengers wait and are indemnified. It costs millions of dollars a year. There's sufficient justification there again.
The investment on GPS is fairly small. I think to date it's less than $2 million over two years, but compared to a billion-dollar positive train control investment, or the millions of dollars that we lose by indemnifying passengers who are delayed hours when the train has to stop because the locomotive engineer violated a rule, or the millions of dollars that we save on fuel, because now we monitor the fuel usage as a train is idled or moved down the track, it makes local engineers better users of fuel, and the cost of fuel has gone down. We've reduced our fuel consumption by 24%—