中国有两条经典的单线铁路 一条是青藏格拉段 另一条是老宝成铁路宝鸡阳平关段 都是单线
可以考虑做下

Really nice map.

It might seem easy at the very start, but you have to take care of normal trains, longer trains (that don't fit in most junctions), faster and longer trains, and even faster trains (that have tip top priority).

At the start you will have to create a plan and understand where to make trains cross and overtake each other. After a while you will get the hang of it and it will become more of a marathon.

Eight hours might seem a lot, but if your foot is broken, you won't have this problem.