Theory# This section describes the theory and ideas behind POLARIS’ components and provides references to published work. Contents# Demand Model Overview Contents Capacity Based Model Model Data structure Inputs Simulation Outputs Next steps Routing Shared Mobility Overview Shared Mobility Operator File TNC Operator TNC Vehicle TNC Assignment TNC Repositioning Dynamic Ride-Sharing First-Mile Last-Mile (FMLM) Helpful Hints Modes Freight Overview of Freight Framework Firm Synthesis and Asset Modeling Channel Choice Logistics Formulation Daily Truck Operation External Trips Module Freight EVCS Optimization