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The Tehran Metro is a rapid transit system serving Tehran, the capital of Iran. The system consists of four operational metro lines (and a fifth regional rail line), with construction begun on a further two lines in 2007.The Tehran Metro carries more than 3 million passengers a day.[3] In 2014, 815 million trips were made on Tehran Metro. As of 2015, the total system was 170 kilometers (110 mi) long, 127 kilometers (79 mi) of which it metro-grade rail. It is planned to have a length of 430 kilometers (270 mi) with 9 lines once all construction is complete by 2028.On all days of the week, the Metro service runs from approximately 05:30 to 23:00.
