Driverless Trains

There are self-driving trains:https://en.wikipedia.org/wiki/List_of_automated_train_system...

Because trains don't need scheduling software or crews?

The problem with some of these old lines is that they might have level crossings in which pedestrians or cars might occupy the tracks - so someone needs to be there to stop the train if that happens. Fully automated systems like the SkyTrain or Japan's Yurikamome line have grade-separated tracks (and in some cases platform gates as well) to ensure that sort of incursion doesn't happen.

Why are we not seeing driver-less trains?

The solution you're asking for exists and is called Positive Train Control. They didn't have it.

An automated rail system might work better.

While there are similarities I don't think they go that far. In particular, driverless train operation is only made possible by the fact that network operators and governments are fanatical about fighting obstructions and unauthorised crossings on railway track—to say nothing of unauthorised users!—regardless of whether the trains are automated or not. (In fact railways seem (I am not an expert) to be very vulnerable to disruption if these efforts fail, viz. the notoriety of train delays in

This video shows signals everywhere: https://www.youtube.com/watch?v=vPE1yDddAiwYou can even see a train on the opposing line stopped at a signal before the platform.You literally would have accidents daily if you had NO signals at all on such an intensive line. You cannot run more than one train on a line with no signals and not have accidents given the stopping distances of trains, you can't do i

Not true for a lot of (widely used) systems. Both the NY subway and London Underground are manually driven for the majority of lines.

Maybe you should try reading the article?from the article:"Many stations like this one are not prepared to accommodate a larger volume of passengers, even if a new traffic control system allowed trains to come more frequently.""Much of the subway’s signal system uses antiquated parts like the electromechanical relays shown above from the West Fourth Street-Washington Square station in Manhattan.Train traffic for about two-thirds of the subway system is monitored in roo