Dr. Irena Ježek of the Aerosol R&D team just published a scientific paper in the prestigious journal Atmospheric Environment titled: “The traffic emission-dispersion model for a Central-European city agrees with measured black carbon apportioned to traffic”. This scientific paper presents a simple methodology for modeling traffic emissions using real world emission factors. Using real-world emission factors in the model is essential, to make the emissions representative of the actual in-use fleet. This is the only way in which emission reduction strategies can be planned, that target vehicles that pollute the most.

The research shows how an improved understanding of traffic emissions and impacts, can lead to improved management and legislative controls. The model’s results were verified with in-situ measurements of Black Carbon apportioned to traffic with the Aethalometer model, and showed excellent agreement. The most efficient emission reduction scenarios were those where the highest polluting vehicles were targeted. Removing 10% of the highest polluting vehicles would reduce BC concentrations in the city center by 39%, and NOx by 33%.

We would like to thank Suzana Pranjc and the Office of Utility, Transport and Spatial Planning of the Municipality of Maribor; the Slovenian Ministry of Infrastructure; the Slovenian Environment Agency; and the Slovenian National Laboratory of Health, Environment and Food; for contributing data to the analyses presented in this pubclication.

This research was supported by the European Social Foundation, (SPIRIT), contract no. P-MR-10/04.

The traffic emission-dispersion model for a Central-European city agrees with measured black carbon apportioned to traffic
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