Again, I want to be clear that this is not purely an economic analysis. It's also a question of risk mitigation and risk management. We're talking about a switch on the main line serving a branch line that in some cases has not had a car on it for over three years. You can imagine this in the dead of winter; it's very clear. If it snows on the Prairies and trains go over the switch, snow gets caught in the switch. Then the day gets a bit warmer but freezes overnight and you're stuck with a switch that has ice in it. It has to be inspected and maintained.
A good railway will tell you that any switch on a main line has to be maintained at such a level that we don't have derailments. There's always a risk of derailments, and the more switches you have, especially for ones not being used, the higher the risks are.
Our job is not just to ascertain the cost of keeping those branch lines open. Our job is also mitigating our risks of an unfortunate derailment that would put down the railway, not just for that branch line, but for all of our customers, and unfortunately impact a community negatively in the case of a derailment over a switch.