Environmental impact model and HBEFA

The Visum add-on module Environment is used to calculate the environmental impact - noise and pollutant emissions - caused by motorized traffic. Three procedures for calculating environmental impact are available:

Calculation of noise emission levels in accordance with RLS-90 (Using Visum: Calculating noise volumes).

Calculation of noise emission levels in accordance with Nordic Council of Ministers (1996) (Using Visum: Calculating noise volumes).

Calculation of air pollution emissions in accordance with emission factors of the Swiss Federal Office for the Environment (BAFU) (Using Visum: Calculating air pollution emissions).

The Visum add-on module HBEFA allows you to calculate emission values in Visum by link, territory or network-wide. The calculation is based on the Handbook Emission Factors for Road Transport version 4.1, as of October 2019 (HBEFA-based emission calculation).