//Driverless trains should have been introduced to all lines years ago. The sooner trains are 100% driverless the better for everyone (apart from drivers.) //
it's not as simple as that. on the DLR it was, because the system was built as fully automated and has always run as such; the underground system hasn't. currently 4 lines are partly automated, Victoria, northern, jubilee and central. door closing is still manual, and the trains can still be driven manually if required (on sundays manual control is done as a matter of course to maintain staff competence). the problems start to arise if there's a mix of automated and manual trains in service together, so a switch to fully automated would have to be done in one hit, only when there are enough trains available to make the switch, and involving complete shutdown of the line concerned. plus, as the "old" tubes were never built with emergency escape walkways (DLR was, and so will CrossRail be), passengers have to be evacuated via the track in an emergency, requiring staff accompaniment - so the need to have staff on all of the trains for that reason kinda negates one of the benefits of having no driver.