IMHO, the turning point several years ago was when Metro went from automated mode to manual mode after having to go from 6 car trains to 8 car trains.  Apparently, the automated mode, where the train driver just looks out for anomalies, doesn&#x27;t have enough precision to handle 8 car trains that consume the entire platform at stations.<p>Under automated mode, you had consistent threshold breaking and acceleration, door opening times, etc.  It was a very smooth ride.