Could someone redpill me on railroad gauges? Like what is the main difference between narrow vs. standard vs. broad?
I am trying to figure out why certain countries went with certain railroad gauges but it seems like all of this is arbitrary. For example, on one hand people say that certain countries went with a narrow gauge railroad because it was cheaper to implement but then on the other hand people say that there is no real cost difference between the gauges. I also read that nowadays if a country were to implement a railroad gauge then it would be broad gauge because it is superior to both narrow and standard gauge.