 Trains are programmed to stop at certain station positions with a precise odometer (accurate to plus or minus five centimetres, 2").They receive their braking program and station stop positions orders (one-third, two-thirds, or end of station) from track beacons prior to entering the station, with additional beacons in the station for ensuring stop precision.The last beacon is positioned at precisely 12 turns of wheels from the end of the platform, which help improve the overall precision of the system.