Grades K–2 · Systems
How can a train take a different track?
A train cannot turn its wheels like a car. At a railway junction, special rails called points help guide it onto one of two tracks.
In the diagramMovable rail tips line up a pathRail tips: close-up from aboveFixed railsMoving tipsWheel edgeRailSide viewof one wheelTop tip fits its fixed railThe points are set for the straight route
The narrow ends of two movable rails shift sideways together. One end fits against a fixed rail while the other moves away. This lines up the chosen path. The raised edge on the inside of each wheel helps it follow the rails.
The points are set and held before the train passes. Moving them the other way lines up the other route. The picture looks down at the rail tips; it leaves out the rest of the junction.
About this explanation
Starting knowledge: Recognize a pair of rails and a branching track.
Sources
- Network Rail — Track
- Transport for NSW — Glossary of Track Terms