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In 2011, Line 3 of the Chongqing Rail Transit system has since been extended to , running past the airport in the north, through the city center to the southern suburbs. To deal with the limited space and up to 100m variations in the hilly terrain, it uses a “straddle-type” monorail system. Earlier, Chongqing lines used foreign technology, but Line 3 was a concerted effort to rely on local talent, leading to 100 new patents and a line that outpaced the length of the previous record-holder in Japan. It carries a million passengers a day.
