Georgia Red Line (MBTA), Boston, Massachusetts Red Line (Pittsburgh), Port Authority, Pennsylvania Red Line (RTA Rapid Transit), Greater Cleveland Regional Transit Authority, Ohio Red Line (Sound Transit), Seattle, Washington Red Line (St. Louis MetroLink), Bi-State Development Agency, Missouri Red Line (TRAX), Utah Transit Authority, Salt Lake City area Red Line (Washington Metro), WMATA, Washington, D.C. Baltimore Light RailLink for Penn Station – Camden Yards Line aka Red Line, Maryland Transit Administration, Baltimore, Maryland B Line (Los Angeles Metro), California Capital MetroRail, Austin, Texas F Line (RTD), aka Red Line, Regional Transportation District, Denver, Colorado IRT Broadway–Seventh Avenue Line in New York City, colored red, serving the Lynx Red Line, North Carolina MAX Red Line, Tri-Met, Portland, Oregon Metro Red Line (Minnesota), METRO/Minnesota Valley Transit Authority, suburban Minneapolis, Minnesota area METRORail Red Line, Houston, Texas PATCO Speedline, Philadelphia, Pennsylvania Rapid Ride Route 766 Red Line, ABQ RIDE, Albuquerque, New Mexico , Bay Area Rapid Transit, San Francisco Bay Area, California T Third Street, MUNI, San Francisco, California Valley Metro Rail, aka METRO Light Rail Red Line, Phoenix, Arizona Red Line (Montreal Metro), Canada (proposed) South America Red Line (Rio de Janeiro), Brazil, an expressway Other uses Red line (phrase), a figurative phrase used in English and Hebrew meaning a limit past which something shouldn't cross safely Red line (hockey), the center of the playing surface on an ice hockey rink Red Line (Namibia), a pest-exclusion fence separating Northern Namibia from the central and southern parts Red Line, the military line of defense in Operation Manta, along the 15th and later 16th parallel north, of the Chadian-Libyan Conflict All Red Line, a network of telegraph cables linking the British Empire Red Line Agreement, an agreement signed by partners in the Turkish Petroleum Company in 1928 Red Line Synthetic Oil Corporation, an oil manufacturer for automotive and other performance applications Red Line, Iowa, an unincorporated community See also Red Belt (Pittsburgh) Red route Redline (disambiguation) The Thin Red Line (disambiguation) Red telephone line (disambiguation) Punainen viiva (disambiguation) Magenta Line (disambiguation) Orange Line (disambiguation) Pink Line (disambiguation) Purple Line (disambiguation)