Line 3

3 Line or Line 3 can refer to the following:

Public transport

Asia

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

China

• 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, Guangzhou Metro, metro line in Guangzhou, Guangdong
• 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, 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

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)

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).