New train lines don't require human drivers, but legacy ones do for socio-political reasons rather than logistical or technological ones. This Wikipedia articl

New train lines don't require human drivers, but legacy ones do for socio-political reasons rather than logistical or technological ones. This Wikipedia article kind of shows the mishmash of automated/half-measures/full measures situation: https://en.wikipedia.org/wiki/Automation_of_the_London_Underground#Current_status https://en.wikipedia.org/wiki/Automation_of_the_London_Under...