From a financial standpoint, it may not be. From a safety standpoint, it would obviously prevent some of the collisions. I would be lying to say that it wouldn't.
However, at this time, as I've explained, we're looking at what the United States is doing. They're having some serious issues. Once these issues are worked out...and perhaps we're not going to talk about a cost-benefit ratio of 21:1; maybe it will be something a bit more acceptable.
We would also have to measure the impact on the short lines. If you impose that on CN and CP and VIA, what are you going to do with the short lines operating on federal tracks?