Train networks are systems of interconnected railways that facilitate the movement of passengers and goods across various regions. These networks consist of tracks, stations, and trains, allowing for efficient transportation. They can vary in size from local commuter lines to extensive national systems, such as those found in Europe or Japan. The operation of train networks relies on scheduling, signaling, and maintenance to ensure safety and reliability. Trains can be powered by electricity, diesel, or steam, depending on the network's design. Additionally, train networks often integrate with other forms of transportation, such as buses and subways, to provide seamless travel options for users.