When trains run on railroad tracks, they need permission to go from one place to another. That permission is called a track warrant. It's like when your mom or dad tells you it's okay to go to a friend's house, but for trains.
The track warrant is a special document that tells the train driver where they can go and when they can go there. It's written down by a person called a dispatcher, who is in charge of making sure all the trains on the tracks are safe and not crashing into each other.
The train driver has to read and follow the track warrant closely so they can stay safe and avoid any problems. The track warrant might tell them they can go fast or slow, or that they must stop at a certain place to wait for another train to pass by.
Overall, the track warrant is like a set of instructions for the train driver. It keeps them and everyone else on the tracks safe as they go about their journey.