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What is the difference between "transfers made on the opposite side of the platform" and "transfers made by going up or down a level or floor"?(Planning)

The term "transfers made on the opposite side of the platform," refers to passengers getting off a train and only needing to take about 10 to 15 seconds to walk to the opposite side of the platform to take trains on another route. They do not need to go up or down stairs, escalators, or elevators, reducing the impact of transferring on the elderly and physically impaired. Benefits include reduced travel time and more convenience. Four stations on the Taipei MRT network feature transfers made on the opposite side of the platform: Guting Station (connecting the Green and Orange lines), Dongmen Station (connecting the Red and Orange lines), Chiang Kai-Shek Memorial Hall Station (connecting the Green and Red lines), and Ximen Station (connecting the Green and Blue lines).