Guidelines & Tools Vehicular Air Pollution Information System (VAPIS) Operational Manual Published 2008 Share SHARE Facebook share Twitter LinkedIn Copy URL Email Download Download SIM-13-2008.pdf en Added on: 20 May, 2025 Breadcrumb Home Resource Library Vehicular Air Pollution Information System (VAPIS) Operational Manual This working paper presents the description of the “Vehicular Air Pollution Information System” (VAPIS) tool. The VAPIS tool was developed to establish the emission trends and evaluate possible management scenarios for one vehicle category, using minimum inputs for the user. The tool can be replicated for multiple pollutants and multiple vehicle fleets, depending on the availability of the input data.