The North Luzon Railways Corporation (NORTHRAIL) is a pre-operating subsidiary of the Bases Conversion and Development Autority (BCDA), whose primary purpose is to develop, construct, operate and manage a railroad system to serve Metro Manila, Central Luzon and Northern Luzon. Presently, NORTHRAIL is an attached agency of the Department of Transportation and Communications (DOTC).

The secondary purpose of NORTHRAIL is develop, construct, manage, own, lease, sublease and operate establishments and facilities of all kinds along the railroad system tourism, amusement and other purposes. Further, the corporation is to develop, generally carry out all the activities of a railway line, commercial development and/or operate, maintain various infrastructure, power and electrical, facilities, drainage and sewerage, telecommunications and utility systems and common facilities.

NORTHRAIL Project Phases. NORTHRAIL Project was originally envisioned to be implemented in the following phases:

Phase I - The rail line between Caloocan City in Metro Manila and the Clark Freeport Zone (CFZ) in Pampanga;

Phase II - Branch line to Subic Econimic Freeport Zone;

Phase III - Extension from Caloocan to Bonifacio Global City and Ninoy Aquino International Airport (NAIA); and

Phase IV - Extension from Pampanga to San Fernando, La Union.

Phase I of the project is divided into two, Section I is between Caloocan and Malolos while Section II is between Malolos while Section II is between Malolos and Clark Freeport Zone. Phase I will use the Philippine National Railway's Right-of-Way of the Main Line North, which has been abandoned for decades.