MRT Line 4 (Metro Manila)

MRT Line 4
Overview
StatusApproved
OwnerGovernment of the Philippines
Department of Transportation
Line number4
LocaleMetro Manila and Rizal
Termini
Stations10
Service
TypeRapid transit
SystemManila MRT
Services1
Depot(s)Excelsior Villas site, Taytay
Rolling stock5-car electric multiple units
Daily ridership400,000 (est.)
History
Planned openingc. 2031 (2031)
Technical
Line length12.7 km (7.9 mi)
Number of tracksDouble-track
CharacterElevated railway
Track gauge1,435 mm (4 ft 8+12 in)
Electrification1,500 V DC overhead lines
Operating speed80 km/h (50 mph)
SignallingCBTC, ATO (GoA 4)
Route map

Taytay depot
Taytay
Manila East Road
Tikling
San Juan
Taytay, Rizal
Cainta, Rizal
Mapindan River
Cainta River
Cainta Junction
Cainta, Rizal
 
Buli Creek
 
Pasig
St. Joseph
Rosario
Tiendesitas
Meralco
 MMS 
Quirino Highway - FTI
 NAIA Terminal 3
EDSA
North Avenue - Taft Avenue

The Metro Rail Transit Line 4 (MRT-4) is a proposed rapid transit line that would serve the Greater Manila Area of the Philippines. The 12.7 km (7.9 mi), 10-station elevated railway would connect Ortigas Center in Metro Manila and the suburban municipality of Taytay, Rizal. It would traverse along Ortigas Avenue and Manila East Road, starting at the former's junction with EDSA in Quezon City to the west until it terminates near the New Taytay Public Market to the east.

Originally proposed as a "heavy monorail" based on the likes of Chongqing Rail Transit's Line 3, the project was revised into a conventional rail system in 2022 upon the recommendation of the project consultants commissioned by the Department of Transportation. Initially expected to cost an estimated 59.3 billion (US$1.1 billion), it was raised to ₱87 billion due to design changes. An initial US$1 billion loan from the Asian Development Bank was signed in November 2024, while additional funding is being sought from the Asian Infrastructure Investment Bank.