International rail networks are systems of train services that connect multiple countries, allowing for the efficient movement of passengers and goods across borders. These networks often include high-speed trains, regional services, and freight transport, facilitating trade and tourism. Notable examples include the Eurostar connecting the United Kingdom and France, and the Trans-Siberian Railway spanning Russia. These rail networks are essential for promoting economic cooperation and cultural exchange between nations. They often feature standardized tracks and coordinated schedules to ensure seamless travel. Additionally, international rail networks contribute to environmental sustainability by providing a lower-emission alternative to road and air transport.