CORSIM is a Final/Approved Schematics and Design-stage tool used to evaluate complex or oversaturated freeway and urban roadway facilities. CORSIM is a Microsimulation (Microscopic) traffic simulation that models freeways, highways, networks, including segments, weaves, merges/diverges, and unsignalized and signalized intersections. CORSIM inputs are similar to Preliminary Schematics-stage tools, with the addition of user-defined driver characteristics (dwell time, driver familiarity, etc.). CORSIM outputs include traffic and environmental MOEs.