The Port District of Manila drafted a 25-year development plan that will cover the improvement of the South Harbor, the North Harbor and the Manila International Container Terminal (MICT). The objectives of that master plan are urgent port extensions for coping with the growing cargo and passenger traffic. Numerous studies in the past recommended that port development projects should be evaluated considering their traffic impact considering and that also the port's land operation is severely hampered by Metro Manila's traffic congestion. In this study, traffic impacts of the projected vehicles to be generated by the proposed port expansion were analyzed using the TRAF-NETSIM simulation software. Since these port projects will generate mostly freight/cargo traffic, focus of this study will be on truck traffic and will incorporate related issues like the effect of the proposed infrastructure along truck routes and the utilization of railroad as an alternative to trucks in cargo distribution.