The annual growth of toll road infrastructure construction in Indonesia is very significant. This infrastructure construction is expected to increase the accessibility and competitiveness of what once were remote areas. Historical data from 1995 to 2001 stated that there were 1722 cases of project duration delay, averaging 11.95% of the initially stated duration. Planning is the most important phase in determining the success of a construction project which will play a major role in the financial revenue of the project. One form of project planning project schedule. This research aims to optimize the baseline project duration that was stated in the initial contract by utilizing the integration of PERT and M-PERT. The scheduling method of M-PERT is the newest development of scheduling systems that was first introduced in 2017 and has the ability to optimizing the project duration up to 8.8%. The statistical analysis done by RII utilization resulted in 10 most influential factors affecting the project duration, which are the ability to combine project activities, manual calculation development, the effect of different activity duration division, duration control, cost control, leadership, good management and supervision, the existing data of road pavement, availability of skilled worker, project management process, and teamwork. The M-PERT implementation optimized the project duration to 24.04 months, clocking 1.96 months or 7.55% upgrade from the initial duration. M-PERT scheduling method has been proven to be feasible and effective in reducing the project duration and delays.
