Blue Line

Blue Line or Blueline may refer to:

Asia

 * Blue Line (Bangkok), Bangkok, Thailand
 * Blue Line (Namma Metro), Bengaluru, India
 * Blue Line (Chennai Metro), Chennai, India
 * Blue Line (Delhi Metro), Delhi, India
 * Blue Line (Dubai Metro), Dubai
 * Blue Line (Hyderabad Metro), Hyderabad, India
 * Blue Line (Lucknow Metro), Lucknow, India
 * Blue Line (Nagpur Metro), Nagpur, India
 * Blue Line (Taichung Metro), Taichung, Taiwan
 * Yokohama Municipal Subway Blue Line, also called Lines 1 & 3, Yokohama, Japan
 * Bannan line, Taipei, Taiwan
 * Busan Metro Line 4, Busan, South Korea
 * Cikarang Line of KRL Commuterline, Jakarta, Indonesia
 * Downtown MRT line, Singapore
 * Island line (MTR), Hong Kong, China
 * Line 2 (Beijing Subway), Beijing, China
 * Manila Light Rail Transit System Line 2, Manila, Philippines
 * Seoul Subway Line 1, Dark Blue Line, Seoul, South Korea
 * Seoul Subway Line 4, Light Blue Line, Seoul, South Korea

Europe

 * Blue Line (airline), based in France
 * Blue Line (Lisbon Metro), Portugal
 * Blue Line (Stockholm Metro), Sweden
 * Blue Line International, a former ferry service in the Adriatic Sea
 * Barcelona Metro line 5, often called "Línia Blava" (Blue Line), Barcelona, Spain
 * Barcelona Metro line 6, Barcelona, Spain
 * Paris Métro Line 2, Paris, France
 * Piccadilly line, London, England
 * Sheffield Supertram Blue Line, United Kingdom
 * Tyne and Wear Metro of Newcastle upon Tyne, UK (Former line)
 * Victoria line, London, England

New York City

 * The Harlem Line of the Metro-North Railroad
 * The Hoboken–33rd Street route of the PATH Train
 * Any of the New York City Subway services that use the IND Eighth Avenue Line and its branches:
 * A Eighth Avenue Express
 * C Eighth Avenue Local
 * E Eighth Avenue Local
 * The former K Eighth Avenue Local
 * The Rockaway Park Shuttle, which formerly contained a blue route bullet
 * The Port Jefferson Branch of the Long Island Rail Road
 * The former JFK Express of the New York City Subway
 * The future T Second Avenue Local of the New York City Subway
 * The West Hempstead Branch of the Long Island Rail Road
 * The Staten Island Railway

Other

 * ARTx Blue Line, formerly Rapid Ride, Albuquerque, New Mexico
 * Blue Line (MARTA), Atlanta, Georgia
 * Blue Line (CapMetro), Austin, Texas
 * Blue Line (MBTA), Boston, Massachusetts
 * Blue Line (Calgary), Calgary, Alberta, Canada
 * Lynx Blue Line, Charlotte, North Carolina
 * Blue Line (CTA), Chicago, Illinois
 * Blue Line (RTA Rapid Transit) (light rail), Cleveland, Ohio
 * Blue Line (Dallas Area Rapid Transit), Dallas, Texas
 * Trinity Railway Express, Dallas, Texas
 * H Line (RTD), Denver, Colorado
 * A Line (Los Angeles Metro), Los Angeles County, California
 * Blue Line (Mexico City Metro), Mexico
 * Blue Line (Mexico City Metrobús), Mexico
 * Metro Blue Line (Minnesota), Minneapolis, Minnesota
 * Blue Line (Montreal Metro), Montreal, Quebec
 * Atlantic City Line, a commuter rail line New Jersey
 * Grove Street – Newark Penn, a light rail line in Newark, New Jersey
 * North Jersey Coast Line, a commuter rail line New Jersey
 * Blue Line (Pittsburgh), Pittsburgh, Pennsylvania
 * Market–Frankford Line, Philadelphia, Pennsylvania
 * Blue Line (Sacramento RT), Sacramento, California
 * Blue Line (San Diego Trolley), San Diego, California
 * Blue Line (BART), San Francisco Bay Area, California
 * N Judah, a Muni Metro light rail line in San Francisco, California
 * Line 3 Scarborough, Toronto, Canada
 * Viva Blue, York Region, Ontario
 * MAX Blue Line, Portland, Oregon
 * Blue Line (St. Louis MetroLink), St. Louis, Missouri
 * Blue Line (Sound Transit), a proposed extension in Seattle, Washington
 * Swift Blue Line, Snohomish County, Washington
 * Blue Line (TRAX), a light rail line in the Salt Lake City, Utah area
 * Blue Line (Washington Metro), Washington, DC
 * Tomorrowland Transit Authority PeopleMover, Walt Disney World, Florida

South America

 * Line 1 (São Paulo Metro), São Paulo, Brazil

Other

 * Blue Line (album), by Yae
 * Blue line (ice hockey), the line between center ice and each team's zone
 * Blue Line (border), the UN drawn demarcation between Lebanon and Israel and Lebanon and the Golan Heights
 * Blue Line (New York State), delineates the Adirondack and Catskill parks of New York's Forest Preserve
 * BlueLine Grid, a mobile communications platform that connects civil service employees
 * Blueline, a 2019 EP by twlv
 * The "blue line", mark on an airspeed indicator for a multi-engine aircraft
 * The blue-line printing process for copying using the diazo chemical process, also known as whiteprint
 * The Blueline Blaster, nickname of Hy Buller (1926–1968), All Star NHL ice hockey player
 * Blue line, a diagram in method ringing which shows the structure of a method
 * Blue-line stream, year-round streams that are typically denoted on maps with solid blue lines
 * "Blue Lines", a song by the American band Bright from the album Full Negative (or) Breaks