Metro (various cities)

Metro systems, or subways, are efficient urban public transport systems that operate underground or above ground. Cities like New York, London, Paris, and Tokyo use metros to alleviate traffic, reduce travel time, and connect neighborhoods. Riders can purchase tickets or passes and access trains at various stations. Metro trains run frequently and have designated routes, indicated by lines or colors on maps. These systems help millions of commuters daily, promoting sustainable transportation and lessening city congestion. Overall, metros are a vital component of urban infrastructure, facilitating mobility in densely populated areas.