Railway transit operations in the Philippines are affected with numerous operational problems such as service interruptions and insufficient train coaches.  These result to long queue of passengers in the station, passengers feeling anxious to be late in work and clamor of riding customers to replace the existing maintenance service provider of the railway transit.  These scenarios have been regular occurrences specifically in a Metro Manila railway transit that traverses from Quezon City to Pasay City. To reduce the occurrences of these problems, this paper proposes to establish a computerized maintenance management system for the railway transit. To implement this, the researchers assessed the current maintenance system of the railway transit; identified causes affecting its maintenance system; developed an improved maintenance system of the railway transit comprising the maintenance planning, maintenance scheduling, performance measurement and spare parts management, and proposed a computerized maintenance management system for the railway transit.  All of these were integrated to come up with a computerized maintenance management system for the railway transit.  This computerized maintenance management system can effectively reduce service interruptions and improve the railway transit’s service performance.