international metro systems

International metro systems are urban transit networks that operate within cities worldwide, providing efficient, rapid transportation for daily commuters. These systems typically include underground and surface trains running on dedicated tracks, connecting major neighborhoods, business districts, and suburbs. Known for high frequency and punctuality, they help reduce traffic congestion and pollution. Each city's metro adapts to its unique geography and population needs, with varying train designs, ticketing methods, and technological features. Overall, metro systems are vital infrastructure, enabling convenient, sustainable movement in densely populated urban areas globally.