Is that a feature or a bug? When something is a certain way, we need to ask whether that is how the ones who are in control of it want it to be, or is it the way they have accepted it to be. Riding Via between Toronto and Montreal/Ottawa, I noticed the CPKC tracks that ran along the CN tracks were only single track. As I understand it, decades ago, a lot of double track was removed to save maintenance costs. The tore up the Chalk River sub to prevent competition on it from the OVR using it as a way to bypass Toronto. But it makes more profit for the shareholders. So, is it that they cannot compete with trucks, or they are designed not to compete with trucks? This goes to my thinking that a mainline should be double track throughout Canada.