[afreak]

This could be answered as yes and also no.

Since 1985, Vancouver has had a 100% automated metro system ("SkyTrain") which has expanded to three lines (soon 4) and about 65 KM in track (soon to be closer to 80).

Almost any metro system could be converted to be automated but SkyTrain was built to be 100% computer-controlled from the get go. To switch from manual to electronic control would likely lead to enormous interruptions and it is unlikely that the unions in charge would accept it. It also isn't a matter of just updating the trains but it also means building sensors at all stations to detect intrusions and it also means changing signal controls. Needless to say it would be a bad idea and likely would just cost money.

In 2001, we suffered a prolonged transit strike that stopped all local bus and ferry service. However, the SkyTrain system continued to operate as normal albeit without any staff at any of the stations.