Not everything fits in the iso container format. Even if it did, you still need to move rolling-stock from one rail system to another from time to time. There

Not everything fits in the iso container format. Even if it did, you still need to move rolling-stock from one rail system to another from time to time. There's a rail ferry in my city [0], and a couple of link-spans to support rail ferries [1]. [0] https://en.wikipedia.org/wiki/Interislander https://en.wikipedia.org/wiki/Interislander [1] https://en.wikipedia.org/wiki/Linkspan https://en.wikipedia.org/wiki/Linkspan