> Semi-autonomous road trains Actually, why aren't there fully autonomous freight trains on railways yet? We have driverless commuter trains (Docklands Light R

> Semi-autonomous road trains Actually, why aren't there fully autonomous freight trains on railways yet? We have driverless commuter trains (Docklands Light Railway) why not the same for long distance freight? The infrastructure is there - automated signalling devices in cab, it doesn't seem too big a leap. One hurdle might be unions, I recall ASLEF or someone got upset about the DLR when it first appeared?