Excessive delays at ports-of-entry (POEs) not only inconvenience passengers but also disrupt supply chains downstream for the POE, causing severe economic damage. Accordingly, CBP is tasked with facilitating vehicular and pedestrian traffic so as to minimize crossing times without compromising security inspections. The team is developing a modeling methodology and a suite of detailed simulation models of POEs for performance metrics and for studies of hypothetical “what-if” scenarios. This project supports future planning of POE evolution (typically expansion and handling traffic surges) and studies in detail hypothetical POE “what-if” issues such as disasters, attacks or disruptions. The project creates 3D and 2D simulation models layered over a realistic geographic map with animated traffic that support ease of use and which are readily understood by users and observers. Each proposed simulation model will serve as a decision support system (DSS) that analyzes data and presents it such that POEs can optimize their choices and configurations.