High-speed trains are advanced rail systems designed to travel at significantly higher speeds than traditional trains, often exceeding 155 miles per hour (250 kilometers per hour). They use specialized tracks and technology to minimize friction and enhance safety, making them a popular choice for long-distance travel in countries like Japan and France. These trains offer a fast and efficient alternative to cars and airplanes, reducing travel time between major cities. High-speed rail networks also contribute to lower carbon emissions compared to other forms of transportation, promoting a more sustainable way to travel while connecting people and economies.