High-speed rail is a type of passenger train service that operates at significantly higher speeds than traditional trains, often exceeding 155 miles per hour (250 kilometers per hour). These trains are designed for long-distance travel, connecting major cities efficiently and reducing travel time. High-speed rail systems are commonly found in countries like Japan, France, and China. The infrastructure for high-speed rail includes specialized tracks, advanced signaling systems, and modern train designs. This mode of transportation is known for being energy-efficient and environmentally friendly, as it can reduce road congestion and lower carbon emissions compared to cars and airplanes.