Metro
A metro is an electric rapid rail system that carries over 45,000 riders per hour in each direction on fully separate tracks with zero road traffic. More than 200 cities across the globe run 20,000 kilometers of metro lines, helping daily riders cut trip times by 40% to 60%. These trains run on tracks built high on pillars or deep inside rock tunnels, keeping travel speeds steady between 32 and 45 km/h. Modern train motors slow down by using electric brakes that send up to 35% of power back into the local grid.
Metro lines carry thousands of workers each day without adding more cars to busy roads. This can help reduce traffic, smoke, and air pollution. These rail lines connect outer residential areas with major office hubs. Faster and cleaner travel can also boost local business and increase demand for land and homes near metro stations.