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by adrianmonk
2807 days ago
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> can only have one train on a track If desired, you could solve this by having a piston that can open up. Stick a butterfly valve[1] in the middle of it. It might even be a significant advantage! A limiting factor of railway throughput is minimum headway[2]. You can't have trains crashing into each other, and trains are bad at stopping, so you need lots and lots of space between them. But if two trains are on the same tube together, they are naturally going to maintain a fixed distance between them. Unfortunately, it's a bit tricky to take advantage of that because when they're close together, if you stop one, you have to stop them all. Also they all have to travel at the same speed, which is annoying if one needs to slow down for a turn. [1]: https://en.wikipedia.org/wiki/Butterfly_valve [2]: https://en.wikipedia.org/wiki/Headway |
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