Predicting exhaust emission changes resulting from local improvement of city bus traffic in Poznan

摘要

In this paper, the authors analyze the influence of the introduced public transit improvements on the exhaust emissions based on the example of the proposed traffic organization changes i.e. separate bus lanes on Garbary and Mostowa streets in Poznan. To that end, software for traffic microsimulation was applied with modules enabling exhaust emission testing being divided into vehicle types, exhaust emission standards and the extent of influence of the traffic conditions. A selected portion of the road network of the city of Poznan was subjected to an analysis that covered the said streets and parts of the adjacent ones. In order to enable a comparison of the introduced changes in the traffic conditions and exhaust emissions level, the authors analyzed the existing road network in the first place (no separate bus lanes) and then, with the same vehicle type structure, the variant with the said modification was scrutinized. The potential influence of the introduced modification in the traffic organization on the traffic rate on the analyzed road portion was determined with the use of a macrosimulation traffic model. The above will enable a comparison of results and an assessment of the purposefulness of the introduction of changes from an environmental point of view. The proposed approach aims at proving the need to extend the current approach to the planning of changes in the traffic organization and the process of realization of infrastructural investments, particularly in the areas of intense housing development by also taking into account the environmental aspects.