"Tug" and "Tugett" help move equipment and supplies throughout the hospital.
It's not unusual while you are walking down the halls of Children's Hospital to be passed by a couple trains.
No need to worry though.
"Tug" and "Tugett" as they're known are robotic cars that move equipment and supplies thought the hospital.
TODAY'S TMJ4 Photojournalist Mark Was gives us a "Whistle Stop" tour.
Watch the video above for more.