Narrow Gauge Lines Are Less Stable Than Standard Lines

One of my favorite train lines in the entire country is this little stretch of tract that connects the mainland with a tiny island called nord strandismur. It's less than a square mile but because its low lying areas flood regularly, it can only really support about a few dozen residents. They reportedly have the smallest school in germany, with just three students. And one narrow gauge rail is the only transit to and from the island.