location where traffic can change between different routes, directions, or sometimes modes, of travel
A junction is any place where linear things, especially roads and railway tracks, meet.
A Road junction is a place where roads meet. These are known as 'T' junctions and 'X' junctions.
A railway junction is a place where two railway tracks join. The shape of a junction looks like
Sometimes the trains just cross and keep going straight ahead to their destination. Sometimes they turn onto the other track to reach the planned destination. Moveable portions of track make this possible.