Treffer: A Python toolkit for integrating geographic information system into regulatory dispersion models for refined pollution modeling.

AERMOD is designated as U.S. Environmental Protection Agency (EPA)'s preferred air dispersion model for refined transportation project hot-spot analyses beginning in 2020. One of the key challenges in its modeling process is spatially encoding roadway geometry, especially when simulating highways with complex geometric designs. This research proposed an open-source Python package, GTA , which enables conversion of publicly available roadway Geographic Information System (GIS) layers into defined sources, and source-based emission rates from MOtor Vehicle Emissions Simulator (MOVES) output for AERMOD modeling. The research selected a suburban area in Atlanta, and conducted a comprehensive analysis in terms of annual PM 2.5 concentration results and the speed of preparing AERMOD input files for highway network modeling both manually and using software developed based on the proposed methodology. The results prove that the proposed methodology significantly expedites the AERMOD input preparation process, and facilitates convenient testing of multiple modeling configurations for multi-scenario or sensitivity analysis. • We present a tool for integrating roadway GIS into regulatory dispersion models. • The efficiency of AERMOD modeling is enhanced by reducing input preparation time. • Multiple modeling setups for scenario analysis can be conveniently tested. • Avoid large VOLUME to prevent underestimation of near-road concentration in AERMOD. [ABSTRACT FROM AUTHOR]