The Metro Manila Subway, formerly known as the Mega Manila Subway (MMS), is an under-construction underground rapid transit line in Metro Manila, Philippines. The 33-kilometer (21 mi) line, which will run north–south between Valenzuela, Quezon City, Pasig, Taguig, Parañaque and Pasay, consists of 17 stations between the East Valenzuela and Bicutan stations. It will become the country's second direct airport rail link after the North–South Commuter Railway, with a branch line to Ninoy Aquino International Airport.
Launch of the Tunnel Boring Machines at Barangay Ugong, Valenzuela. January 9, 2023.
North Avenue Station pre-construction works in Bagong Pag-asa, Quezon City
Rapid transit or mass rapid transit (MRT), also known as metro, is a type of high-capacity public transport that is generally built in urban areas. A rapid transit system that primarily or traditionally runs below the surface may be called a subway, tube, or underground. Unlike buses or trams, rapid transit systems are railways, usually electric, that operate on an exclusive right-of-way, which cannot be accessed by pedestrians or other vehicles. They are often grade-separated in tunnels or on elevated railways.
The London Underground is the world's first and oldest rapid transit system.
The New York City Subway is the world's largest single-operator rapid transit system by number of metro stations, at 472.
A crowded Paris Métro average station platform in 2007
A station of the Guangzhou Metro in 2005