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Originally Posted by Kitchissippi
Even if the trains are fully automated, someone is going to have to monitor it somewhere. At this point what's the difference between having those eyes on the train or some screen in a remote location?
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Partially true. It is more efficient to have people monitor the system remotely than it is to have someone on every train, but you are right and the perceived cost savings aren't as great as they are in reality.
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I'm thinking about cases where someone jumps on to the tracks or jams the doors. Having a human on the train even though they're just pressing a button most of the time would be more responsive than calling someone to deal with a situation.
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There are other ways of dealing with this situation. In Vancouver they have sensors at the stations to detect when someone falls onto the tracks and it will automatically stop an approaching train. The sensors can react faster than a human operator and you don't need to worry about the physiological damage to a driver that was unable to stop the train in time. Between the stations, you make it very difficult to get onto the tracks (though you can never completely prevent stupidity).
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Originally Posted by FFX-ME
Originally though the plan was to run the trains at grade in the suburbs which would mean automation would be impossible.
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Only impossible with current technology. It won't be long before the technology used for driver-less cars will be applied to LRT trains.
Other options are to have sensors, similar to stations, determine that it is all clear or you could have someone remotely monitor the crossing and confirm all is clear. In the later case, fixed cameras could be used to get a better view than from the cab of the train and confirm traffic is stopping.