A railway junction is a point where two or more railway lines meet, allowing trains to switch from one track to another. These junctions are crucial for managing train traffic and ensuring efficient transportation. They often feature signals and switches that guide trains safely through the intersection. Junctions can vary in complexity, from simple crossings to large hubs with multiple tracks and platforms. Major railway junctions, like Grand Central Terminal in New York City, serve as key transit points, connecting various routes and facilitating passenger and freight movement across regions.