Public transit in Asia

• Imazatosuji Line (Osaka), Japan
• Line 7, Shanghai Metro, Shanghai, China
• MRT Orange Line, a planned line in Bangkok, Thailand
• Orange Line (Taipei Metro), Taipei, Taiwan
• Orange Line, KMRT
  Orange Line, KMRT
  The Orange Line is an East-West line of the Kaohsiung Mass Rapid Transit in Kaohsiung, Taiwan. It opened on September 14, 2008, the day of Mid-Autumn Festival, for a week-long free trial service...
  
  , Kaohsiung, Taiwan
• Seoul Subway Line 3
  Seoul Subway Line 3
  Seoul Subway Line 3 of the Seoul Metropolitan Subway is an operation system which connects Goyang, northwestern Seoul to the city center, Gangnam, and southeastern Seoul. Construction began in 1980, and most of the current line opened over two stages in 1985, along with Brother subway Line 4...
  
  , South Korea
• Tokyo Metro Ginza Line
  Tokyo Metro Ginza Line
  The is a subway line located in Tokyo, Japan. It is part of the of Tokyo Metro network. The official name is . It is 14.3 km long and serves the wards of Shibuya, Minato, Chūō, Chiyoda, and Taitō....
  
  , Tokyo, Japan
• MTR Tung Chung Line, Hong Kong, China

Public transit in Europe

• Barcelona metro line 9
  Barcelona Metro line 9
  Line 9 is a line of the Barcelona Metro network that is currently under construction, with five stations open in the Santa Coloma de Gramenet suburb since December 2009...
  
  , Barcelona, Spain
• East London Line
  East London Line
  The East London Line is a London Overground line which runs north to south through the East End, Docklands and South areas of London.Built in 1869 by the East London Railway Company, which reused the Thames Tunnel, originally intended for horse-drawn carriages, the line became part of the London...
  
  , London, England
• Helsinki Metro
  Helsinki Metro
  The Helsinki Metro , is the metro system in Helsinki, Finland. It is the World's most northern metro system, and currently the only one in Finland. The system was opened to the general public on 2 August 1982 after 27 years of planning...
  
  , Helsinki, Finland
• Line 7 (Madrid Metro)
  Line 7 (Madrid Metro)
  Line 7 of the Madrid Metro originally opened on 17 July 1974 between Pueblo Nuevo and Las Musas. On 17 May 1975, the line was extended from Pueblo Nuevo to Avenida de América and for many years, this remained the length of Line 7. This was a problem as line 7 was very scarcely used. This was solved...
  
  , Madrid, Spain
• Lyon Metro Line C
  Lyon Metro Line C
  Lyon Metro Line C is the modern incarnation of an old cable-hauled railway operating on part of the current alignment. In 1891, the Funiculaire Croix-Rousse - Croix-Paquet was opened, running between its namesake stations...
  
  , Lyon, France
• Pravoberezhnaya Line
  Pravoberezhnaya Line
  Pravoberezhnaya Line , is a line of the Saint Petersburg Metro. Opened in 1985, it is the shortest line in the system with the stations featuring a modern design...
  
  , Saint Petersburg Metro

Public transit in North America

• Orange Line (Chicago Transit Authority)
  Orange Line (Chicago Transit Authority)
  The Orange Line, is a rapid transit line in Chicago, Illinois run by the Chicago Transit Authority as part of the 'L' system. It is approximately long, and runs below grade and elevated on existing railroad embankments and new concrete and steel structures from Chicago Midway International...
  
  , Chicago, Illinois
• Orange Line (Dallas Area Rapid Transit)
  Orange Line (Dallas Area Rapid Transit)
  The Orange Line will be a 14 mile mass transit light rail line in Dallas, Texas operated by the Dallas Area Rapid Transit system. It will operate in addition to the currently existing , and lines...
  
  , a light rail line in Dallas, Texas
• Orange Line (Los Angeles Metro), Los Angeles, California (busway)
• Orange Line (MBTA)
  Orange Line (MBTA)
  The Orange Line is one of the four subway lines of the Massachusetts Bay Transportation Authority. It extends from Forest Hills in Jamaica Plain, Boston in the south to Oak Grove in Malden, Massachusetts in the north. It meets the Red Line at Downtown Crossing, the Blue Line at State, and the Green...
  
  , Boston, Massachusetts
• Orange Line (MDT), Miami, Florida
• Orange Line (Washington Metro)
  Orange Line (Washington Metro)
  The Orange Line of the Washington Metro consists of 26 rapid transit stations from Vienna to New Carrollton. It has stations in Fairfax County and Arlington, Virginia, the District of Columbia, and Prince George's County, Maryland. Half of the line's stations are shared with the Blue Line, and over...
  
  , Washington, DC
• Broad Street Line
  Broad Street Line
  The Broad Street Line is a rapid transit line operated by the Southeastern Pennsylvania Transportation Authority that runs from Fern Rock Transportation Center in North Philadelphia, Pennsylvania to Pattison Avenue in South Philadelphia...
  
  , Philadelphia, Pennsylvania
• C Line (RTD)
  C Line (RTD)
  The C Line—also referred to as the Orange Line, because the line is colored orange on maps—is a light rail line which is part of the light rail system operated by the Regional Transportation District in the Denver-Aurora Metropolitan Area in Colorado. The line was added to the system on...
  
  , Denver, Colorado
• IND Sixth Avenue Line
  IND Sixth Avenue Line
  The Sixth Avenue Line is a rapid transit line of the B Division of the New York City Subway in the United States. It runs mainly under Sixth Avenue in Manhattan, and continues south through the Rutgers Street Tunnel to Brooklyn...
  
  , New York City
• Line 2 Orange (Montreal Metro)
  Line 2 Orange (Montreal Metro)
  The Orange line is the longest, most congested, and first-planned of the four lines of the Montreal Metro, in Montreal, Canada. It formed part of the initial network, and was extended between 1980 and 1986...
  
  , Montreal, Quebec
• MAX Orange Line
  MAX Orange Line
  The MAX Orange Line is a planned light rail line for the Metropolitan Area Express light rail system in Portland, Oregon, USA. It is currently under construction. The line is the second part of a two-phase transportation plan known as the South Corridor Project, bringing light rail service to...
  
  , a planned light rail line in Portland, Oregon
• Orangeline, a proposed Maglev system in Santa Clara, California
  Santa Clara, California
  Santa Clara , founded in 1777 and incorporated in 1852, is a city in Santa Clara County, in the U.S. state of California. The city is the site of the eighth of 21 California missions, Mission Santa Clara de Asís, and was named after the mission. The Mission and Mission Gardens are located on the...
  
  
• Richmond - Fremont Line
  Richmond - Fremont Line
  The Richmond–Fremont line of the Bay Area Rapid Transit system in the San Francisco Bay Area of the United States consists of 18 metro stations from Richmond to Fremont. It passes through El Cerrito, Berkeley, Oakland, San Leandro, Hayward, and Union City. Throughout its journey, it shares its...
  
  , San Francisco Bay Area, California
• Orange Line (San Diego Trolley), San Diego, California
• Viva Orange
  Viva Orange
  Viva Orange, or the Martin Grove-York University-Downsview line, is a line on the Viva bus rapid transit system in York Region, north of Toronto, Ontario, Canada. Its entire route is also served by other agencies' bus rapid transit services...
  
  , York Region, Ontario, Canada

Other uses

• An underground telecommunication line in the American Public Works Association utility location color code