> Of course there are many lines that are but the majority. Even boring subway lines not intercity. Many subway lines are automated. It just turns out that it

> Of course there are many lines that are but the majority. Even boring subway lines not intercity. Many subway lines are automated. It just turns out that it is not cost effective to move between Level 2 (driverless, but the driver operates the doors and drives the train if needed) and Level 4 (fully unattended). This is because the cost of the driver is less than the cost of having the system be fully autonomous. The Victoria Line in London, for instance, has been automatically operated since 1968. The driver just opens and closes the doors, and handles any unexpected situations.