Southern California is a nationally important freight region—approximately one-third of the U.S. freight volume flows through the region’s transportation network. Drayage operations in the region utilize appointment systems at marine terminals and inland warehouses, but these systems are usually managed separately. The uncoordinated appointment windows contribute to missed or late pickups, avoidable truck staging and idling, repeat trips, and recurring truck surges on the region’s freeway and arterial corridors. This project will leverage the research team’s validated agent-based transportation model to evaluate whether coordination between marine terminal appointments, truck dispatch timing, and warehouse receiving windows can improve freight network performance. The study will represent marine terminal appointments as upstream release constraints and warehouse receiving windows as downstream service constraints for selected warehouse clusters in the Inland Empire. Scenario-based simulation will compare uncoordinated baseline operations against coordination strategies such as matched appointment windows, congestion-aware truck-release metering, and buffer rules between port release and warehouse receipt. Outputs will include drayage travel time reliability, missed appointment rates, truck queueing and idling, truck miles and hours traveled, passenger vehicle delay, corridor speeds, and operating cost impacts. The project will also identify which warehouse clusters and freight corridors are the strongest candidates for implementation. The project will provide a decision-support tool for freight system management in a nationally important freight region.