A train is a mode of transportation that runs on tracks and is designed to carry passengers or cargo. It typically consists of a series of connected cars pulled by a locomotive, which provides the power needed to move. Trains can travel long distances and are often used for commuting, freight transport, and tourism. Trains operate on a schedule and can be found in many countries around the world. They come in various types, including freight trains, which transport goods, and passenger trains, which carry people. High-speed trains, like the Shinkansen in Japan, can travel at very high speeds, making them a popular choice for long-distance travel.