Line 1
- 1 (New York City Subway service)
- 1 Line (Sound Transit)
- 1 Train (disambiguation)
- Barcelona Metro line 1
- Blue Line (Kolkata Metro)
- Brussels Metro line 1
- Bucharest Metro Line M1
- Busan Metro Line 1
- Cairo Metro Line 1
- Chief Whip
- Daegu Metro Line 1
- Daejeon Metro Line 1
- First Line (disambiguation)
- Green Line (Montreal Metro)
- Gwangju Metro Line 1
- I Train (disambiguation)
- Incheon Subway Line 1
- Kūkō Line (Fukuoka City Subway)
- L Line (disambiguation)
- L1 Dulwich Hill Line
- LINE1
- LRT Line 1 (Metro Manila)
- Line 01 (Phnom Penh Bus Rapid Transit)
- Line 1 (Algiers Metro)
- Line 1 (Almaty Metro)
- Line 1 (Athens Metro)
- Line 1 (Baixada Santista LRT)
- Line 1 (Beijing Subway)
- Line 1 (Bilbao metro)
- Line 1 (Changchun Rail Transit)
- Line 1 (Changsha Metro)
- Line 1 (Changzhou Metro)
- Line 1 (Chengdu Metro)
- Line 1 (Chengdu Tram)
- Line 1 (Chennai Metro)
- Line 1 (Chongqing Rail Transit)
- Line 1 (Dalian Metro)
- Line 1 (Delhi Metro)
- Line 1 (Doha Metro)
- Line 1 (Dongguan Rail Transit)
- Line 1 (Foshan Metro)
- Line 1 (Fuzhou Metro)
- Line 1 (Granada Metro)
- Line 1 (Guangzhou Huangpu Tram)
- Line 1 (Guangzhou Metro)
- Line 1 (Guilin Rail Transit)
- Line 1 (Guiyang Metro)
- Line 1 (Hangzhou Metro)
- Line 1 (Harbin Metro)
- Line 1 (Havana Suburban Railway)
- Line 1 (Hefei Metro)
- Line 1 (Hiroshima Rapid Transit)
- Line 1 (Hohhot Metro)
- Line 1 (Jinan Metro)
- Line 1 (Kharkiv Metro)
- Line 1 (Kunming Metro)
- Line 1 (Kyiv Metro)
- Line 1 (Lanzhou Metro)
- Line 1 (Lima Metro)
- Line 1 (Lucknow Metro)
- Line 1 (Luoyang Subway)
- Line 1 (Madrid Light Metro)
- Line 1 (Madrid Metro)
- Line 1 (Metrovalencia)
- Line 1 (Metrovía)
- Line 1 (Minsk Metro)
- Line 1 (Moscow Metro)
- Line 1 (Mumbai Metro)
- Line 1 (Mumbai Monorail)
- Line 1 (Nagoya Municipal Subway)
- Line 1 (Nagpur Metro)
- Line 1 (Nanchang Metro)
- Line 1 (Nanhai Tram)
- Line 1 (Nanjing Metro)
- Line 1 (Nanning Metro)
- Line 1 (Nantong Metro)
- Line 1 (Naples Metro)
- Line 1 (Navi Mumbai Metro)
- Line 1 (Ningbo Rail Transit)
- Line 1 (Nizhny Novgorod Metro)
- Line 1 (O-Train)
- Line 1 (Osaka Metro)
- Line 1 (Panama Metro)
- Line 1 (Pune Metro)
- Line 1 (Qingdao Metro)
- Line 1 (Rio LRT)
- Line 1 (Rio de Janeiro)
- Line 1 (Saint Petersburg Metro)
- Line 1 (Santo Domingo Metro)
- Line 1 (Shanghai Metro)
- Line 1 (Shaoxing Metro)
- Line 1 (Shenyang Metro)
- Line 1 (Shenzhen Metro)
- Line 1 (Shijiazhuang Metro)
- Line 1 (Suzhou Metro)
- Line 1 (São Paulo Metro)
- Line 1 (Taiyuan Metro)
- Line 1 (Thessaloniki Metro)
- Line 1 (Tianjin 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 (Yerevan Metro)
- Line 1 (Zhengzhou Metro)
- Line 1 (Ürümqi Metro)
- Line 1 Yonge–University
- Line 1 of the Guadalajara urban rail system
- M1 (Copenhagen Metro)
- M1 (Warsaw)
- Metro Line M1 (Budapest Metro)
- Metrorrey Line 1
- Mexico City Metro Line 1
- Mexico City Metrobús Line 1
- Milan Metro Line 1
- One Line (disambiguation)
- Paris Métro Line 1
- Route 1 (MTA Maryland)
- Santiago Metro Line 1
- Seoul Subway Line 1
- Seremban Line
- Seville Metro line 1
- Tehran Metro Line 1
- Tempo (bus rapid transit)
- Toei Asakusa Line
- U1 (Berlin U-Bahn)
- U1 (Frankfurt U-Bahn)
- U1 (Hamburg U-Bahn)
- U1 (Munich U-Bahn)
- U1 (Nuremberg U-Bahn)
- U1 (Vienna U-Bahn)
- Wenhu Line
- Île-de-France tramway Line 1