The system is run on Midgar Standard Time, with the system threaded throughout the city's upper plate and linked to a neglected Train Graveyard in the city's slums via a giant circular track that spirals up the city's central pillar. These rail systems are heavily monitored by the city's security system, with various security checkpoints along the routes used to automatically scan the ID cards of the passengers. An invalid ID results in the train being locked down car by car.