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The Confederation Line (French: Ligne de la Confédération), also called O-Train Line 1 (French: Ligne 1 de l'O-Train), is a light rail line operated by OC Transpo in Ottawa, Ontario, Canada, as part of the city's O-Train light rail system. It opened on September 14, 2019, and is O-Train's second line. It operates on an east–west route, with a segment under Queen Street in the downtown core, complementing the north–south Trillium Line that operates to the west of the downtown core. Using light rail rolling stock and technology (e.g. pantograph electrical pickup from overhead catenary rather than a third rail), the Confederation Line is completely grade separated.