When you speak of inspection, I'll highlight a couple of areas that the technology is really taking us forward on. First of all, for context, Canadian railways have a very enviable safety record in terms of train accident rates, internationally and when compared to the U.S. class 1 industry.
We do 55,000 miles a year of ultrasonic rail testing. These are advanced machines that roll along the track and can detect flaws inside the rail that can't be detected any longer with visual inspection. It used to be that the operator had to get out and check defects when they found them. We're now trying to move that to a broader basis of non-stop testing so that we can go further, do more inspection using technology. And we think that's really the key to improving the infrastructure further, to turn maintenance forces today from finders into fixers. In other words, they're not searching for the defect; they're focusing their efforts on repairing defects that are located by these advanced technologies that are very expensive to operate but which we're investing in heavily as part of our programs, and which are really paying significant dividends going forward.