Line 3

3 Line or Line 3 can refer to the following:

A Pipeline

• Enbridge Line 3, a tar sands oil pipeline

Public transport

Asia

• Busan Subway Line 3, Busan, South Korea
• Seoul Subway Line 3, part of Seoul metropolitan railway, South Korea

China

• Line 3 (Beijing Subway), a subway line under construction in Beijing
• Line 3 (Changchun Subway), metro line in Changchun, Jilin
• Line 3 (Chengdu Metro), metro line in Chengdu, Sichuan
• Line 3 (Chongqing Rail Transit), a metro line in Chongqing
• Line 3 (Dalian Metro), metro line in Dalian, Liaoning
• Line 3 (Dongguan Rail Transit), planned metro line in Dongguan, Guangdong
• Line 3 (Foshan Metro), metro line in Foshan, Guangdong
• Line 3 (Guangzhou Metro), metro line in Guangzhou, Guangdong
• Line 3 (Harbin Metro), metro line in Harbin, Heilongjiang
• Line 3 (Kunming Rail Transit), metro line in Kunming, Yunnan
• Line 3 (Nanjing Metro), metro line in Nanjing, Jiangsu
• Line 3 (Qingdao Metro), metro line in Qingdao, Shandong
• Line 3 (Shanghai Metro), metro line in Shanghai
• Line 3 (Shenzhen Metro), metro line in Shenzhen, Guangdong
• Line 3 (Shijiazhuang Metro), metro line in Shijiazhuang, Hebei
• Line 3 (Tianjin Metro), metro line in Tianjin
• Line 3 (Wuhan Metro), metro line in Wuhan, Hubei
• Line 3 (Xi'an Metro), metro line in Xi'an, Shaanxi

Taiwan

• Taipei Metro Line 3

Malaysia

• Ampang Line, called Line 3 at route map

Europe

• Line 3 (Athens Metro), a metro line of the Athens Metro, Athens, Greece
• Line 3 (Budapest Metro), a subway line of the Budapest Metro, Budapest, Hungary
• Line 3 (Moscow Metro), a metro line of the Moscow Metro, Moscow, Russia
• Île-de-France tramway Line 3
• Line 3 (Paris Métro)
• U3 (Vienna U-Bahn), a subway line of Vienna U-Bahn, Vienna, Austria

North America

Canada

• Line 3 Scarborough in Toronto
• The never built Line 3 Red (Montreal Metro)

Mexico

• Mexico City Metro Line 3, a rapid transit line in Mexico City

United States

• Route 3 (Baltimore),Maryland, bus route
• 3 (New York City Subway service)

South America

• Santiago Metro Line 3

Measurement

• A Line is an obsolete unit of measurement equal to 1/10 of an inch used for example as a measurement of gun calibers. 3-Line (Russian: трёхлинейка) is a Russian nickname for Mosin–Nagant rifle.

Politics

• A "three-line whip" is an application of a Whip in politics (see Chief Whip for details).