# Blue Line

Blue Line or Blueline may refer to:

## Transportation
### Asia
#### China

* Line 2 (Beijing Subway), Beijing, China
* Island line (MTR), Hong Kong, China

#### India

* Blue Line (Namma Metro), Bengaluru, India
* Blue Line (Chennai Metro), Chennai, India
* Blue Line (Delhi Metro), Delhi, India
* Blue Line (Hyderabad Metro), Hyderabad, India
* Blue Line (Kolkata Metro), Kolkata, India
* Blue Line (Lucknow Metro), Lucknow, India
* Blue Line (Nagpur Metro), Nagpur, India

#### South Korea

* Busan Metro Line 4, Busan, South Korea
* Seoul Subway Line 1, Dark Blue Line, Seoul, South Korea
* Seoul Subway Line 4, Light Blue Line, Seoul, South Korea

#### Taiwan

* Blue Line (Taichung Metro), Taichung, Taiwan
* Bannan line, Taipei, Taiwan

#### Others

* Blue Line (Bangkok), Bangkok, Thailand
* Blue Line (Dubai Metro), Dubai
* Cikarang Line of KRL Commuterline, Jakarta, Indonesia
* Manila Light Rail Transit System Line 2, Manila, Philippines
* Line 1 (Riyadh Metro), Blue Line, Riyadh, Saudi Arabia
* Downtown MRT line, Singapore
* Yokohama Municipal Subway Blue Line, also called Lines 1 & 3, Yokohama, Japan

### 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

### North America
#### 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 (DART), 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 (SacRT), 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
* Line 4 (O-Train), the Airport Link of Ottawa's O-Train (Line 4)

### 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 (withdrawal line), the UN drawn demarcation line dividing Lebanon from Israel 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