Comment Comment by throw0101c > You need some combination of high-ridership and low-personnel-cost.Driverless (GoA3) and completely unattended (GoA4) rail operation is possible, which could help with personnel costs:* https://en.wikipedia.org/wiki/Automatic_train_operation parent throw0101c 6 days ago
Driverless (GoA3) and completely unattended (GoA4) rail operation is possible, which could help with personnel costs:
* https://en.wikipedia.org/wiki/Automatic_train_operation