# Line 1

Line 1 or 1 line may refer to:

## Public transport
### Africa

* Line 1 (Algiers Metro), Algeria
* Cairo Metro Line 1, Egypt

### Asia
#### China

* Line 1 (Beijing Subway)
* Line 1 (Changchun Rail Transit)
* Line 1 (Changsha Metro)
* Line 1 (Changzhou Metro)
* Line 1 (Chengdu Metro)
* Line 1 (Chengdu Tram) (planned)
* Line 1 (Chongqing Rail Transit)
* Line 1 (Dalian Metro)
* Line 1 (Dongguan Rail Transit)
* Line 1 (Foshan Metro) or Guangfo Metro
* Line 1 (Fuzhou Metro)
* Line 1 (Guangzhou Huangpu Tram)
* Line 1 (Guangzhou Metro)
* Line 1 (Guilin Rail Transit) (under construction)
* Line 1 (Guiyang Metro)
* Line 1 (Hangzhou Metro)
* Line 1 (Harbin Metro)
* Line 1 (Hefei Metro)
* Line 1 (Hohhot Metro)
* Line 1 (Jinan Metro)
* Line 1 (Kunming Metro)
* Line 1 (Lanzhou Metro)
* Line 1 (Luoyang Subway)
* Line 1 (Nanchang Metro)
* Line 1 (Nanhai Tram)
* Line 1 (Nanjing Metro)
* Line 1 (Nanning Metro)
* Line 1 (Nantong Metro)
* Line 1 (Ningbo Rail Transit)
* Line 1 (Qingdao Metro)
* Line 1 (Shanghai Metro)
* Line 1 (Shaoxing Metro)
* Line 1 (Shenyang Metro)
* Line 1 (Shenzhen Metro)
* Line 1 (Shijiazhuang Metro)
* Line 1 (Suzhou Rail Transit)
* Line 1 (Taiyuan Metro) (under construction)
* Line 1 (Tianjin Metro)
* Line 1 (Ürümqi Metro)
* Line 1 (Wuhan Metro)
* Line 1 (Wuhu Rail Transit)
* Line 1 (Wuxi Metro)
* Line 1 (Xi'an Metro)
* Line 1 (Xiamen Metro)
* Line 1 (Xuzhou Metro)
* Line 1 (Zhengzhou Metro)

#### India

* Line 1 (Chennai Metro) or Blue Line
* Line 1 (Delhi Metro) or Red Line
* Line 1 (Lucknow Metro) or Red Line
* Line 1 (Mumbai Metro)
* Line 1 (Mumbai Monorail)
* Line 1 (Nagpur Metro) or Orange Line
* Line 1 (Navi Mumbai Metro)
* Line 1 (Pune Metro) or Purple Line
* Blue Line (Kolkata Metro), the first metro line of Kolkata and of India

#### Japan

* Line 1 (Hiroshima Rapid Transit) or Astram Line
* Line 1 (Nagoya Municipal Subway) or Higashiyama Line
* Line 1 (Osaka Metro) or Midōsuji Line
* Kūkō Line (Fukuoka City Subway)
* Toei Asakusa Line, Tokyo

#### South Korea

* Busan Metro Line 1
* Daegu Metro Line 1
* Daejeon Metro Line 1
* Gwangju Metro Line 1
* Incheon Subway Line 1
* Seoul Subway Line 1

#### Other places in Asia

* Line 1 (Yerevan Metro), Armenia
* Line 01 (Phnom Penh Bus Rapid Transit), Cambodia
* Tehran Metro Line 1, Iran
* Line 1 (Almaty Metro), Kazakhstan
* Seremban Line, Malaysia
* LRT Line 1 (Metro Manila), Philippines
* Line 1 (Doha Metro) or Red Line, Qatar
* Line 1 (Singapore), a service of the East West MRT Line
* Wenhu Line, Taipei, Taiwan

### Australia

* L1 Dulwich Hill Line, Sydney, New South Wales
* T1 North Shore & Western Line, Sydney Trains service, New South Wales

### Europe
#### France

* Île-de-France tramway Line 1, Paris
* Paris Métro Line 1

#### Germany

* U1 (Berlin U-Bahn)
* U1 (Frankfurt U-Bahn)
* U1 (Hamburg U-Bahn)
* U1 (Munich U-Bahn)
* U1 (Nuremberg U-Bahn)

#### Greece

* Line 1 (Athens Metro)
* Line 1 (Thessaloniki Metro)

#### Italy

* Line 1 (Naples Metro)
* Milan Metro Line 1

#### Russia

* Line 1 (Moscow Metro) or Sokolnicheskaya line
* Line 1 (Nizhny Novgorod Metro)
* Line 1 (Saint Petersburg Metro)

#### Spain

* Line 1 (Bilbao metro)
* Line 1 (Granada Metro)
* Line 1 (Madrid Metro)
* Line 1 (Madrid Light Metro)
* Line 1 (Metrovalencia)
* Barcelona Metro line 1
* Seville Metro line 1

#### Ukraine

* Line 1 (Kharkiv Metro), Ukraine
* Line 1 (Kyiv Metro) or Sviatoshynsko–Brovarska line

#### Other places in Europe

* U1 (Vienna U-Bahn), Austria
* Line 1 (Minsk Metro) or Maskoŭskaja line, Belarus
* Brussels Metro line 1, Belgium
* M1 (Copenhagen Metro), Denmark
* Metro Line M1 (Budapest Metro), Hungary
* M1 (Warsaw), Poland
* Bucharest Metro Line M1, Romania

### North America
#### Canada

* Line 1 (O-Train) or Confederation Line, Ottawa, Ontario
* Line 1 Yonge–University, Toronto, Ontario
* Green Line (Montreal Metro), officially Line 1, Quebec

#### Mexico

* Metrorrey Line 1, Monterrey
* Mexico City Metro Line 1
* Mexico City Metrobús Line 1
* Line 1 of the Guadalajara urban rail system

#### United States

* Tempo (bus rapid transit), Line 1T, Oakland, California
* Route 1 (MTA Maryland)
* 1 (New York City Subway service), New York
* 1 Line (Sound Transit), Seattle, Washington

#### Other places in North America

* Line 1 (Havana Suburban Railway), Cuba
* Line 1 (Santo Domingo Metro), Dominican Republic
* Line 1 (Panama Metro)

### South America
#### Brazil

* Line 1 (Baixada Santista LRT), São Paulo
* Line 1 (Rio de Janeiro)
* Line 1 (Rio LRT)
* Line 1 (São Paulo Metro)

#### Other places in South America

* Santiago Metro Line 1, Chile
* Line 1 (Metrovía), Guayaquil, Ecuador
* Line 1 (Lima Metro), Peru

## Other uses

* A "one-line whip", an application of a Whip in politics
* LINE1 (a.k.a. L1), a non-LTR retrotransposon and the only Long INterspersed Element (LINE) active in the human genome