An impact model contains all methods to calculate the impact of traffic. It calculates results on the basis of data and thus represents the computation kernel of the application. Components of the different impact models offered in Visum are in particular assignment, skim calculation, line blocking, line costing calculation (PuT operating indicators) and emission calculation, including the impedance models used in them. Each of these methods is part of at least one of the impact models for users, operators and the environment.
