A railroad is a system of tracks that trains travel on to transport goods and passengers. It consists of steel rails laid on wooden or concrete ties, which are supported by a bed of gravel. Railroads are an essential part of transportation infrastructure, connecting cities and regions.
Trains that run on railroads can be powered by steam, diesel, or electricity. They are used for various purposes, including freight transport, commuter services, and long-distance travel. The development of railroads, especially during the 19th century, significantly impacted economies and societies, facilitating trade and movement across vast distances.