IVU Umwelt GmbH

Version 5 of IMMISem / IMMISair available


Source: IVU Umwelt GmbH

Version 5 of IMMISem/air, the model for road traffic emissions and air quality screening, now features an English user interface. Emission calculation is based on and in accordance with the current European Handbook for Emission factors (HBEFA 3.1). Major adjustments where necessary in IMMISem in order to reflect the new concept for the traffic situations. A model for calculating levels of service (LOS) has been implemented to replaces the old Stop&Go-model. Due to the new traffic situation scheme, the emission factors for PM10 and PM2.5 also had to be revised.

Additionally, IMMISair was extended by new methods to determine NO2 annual mean values with two new approaches, taking into account the direct NO2 emissions and a simplified photochemistry.

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