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Master Thesis

Pertinence d’un modèle couplé trafic et émission de polluants utilisant une approche agrégée de modélisation du trafic à l’échelle urbaine pour l’évaluation environnementale

Abstract : Air pollution generated by road traffic is a major challenge in terms of public health and the environment. One of the LICIT laboratory's work focuses on traffic management with two objectives: to streamline traffic and reduce emissions of air pollutants at an urban scale. The laboratory has a highperformance MFD traffic model, developed on a large urban scale and based on the multi-reservoir approach. This traffic model has been coupled with the COPERT emissions model developed within the European MAGnUM project. In order to study the relevance of this coupled model for environmental assessment, the coupled traffic-emission model was applied to the metropolis of Lyon, with a spatial division into 10 reservoirs. The traffic model was previously calibrated based on the 2011 data. The results of this model were then provided to the COPERT emission model for estimating pollutant emissions (CO2 for the environment, NOx, and PM10 for health) at the city scale. On the other hand, access to more recent and richer data made it possible to study the influence of calibration on the coupled traffic-emissions model. Thus, part of the work consisted in carrying out a second simulation coupled with the 2018 data, then comparing the 2011 and 2018 emission results. These were then compared with 2018 data from ATMO Auvergne Rhône Alpes. The results show that the new 2018 input data, although more informative, does not improve the results of the 2011 simulation. Moreover, the comparison of the simulation results with the ATMO data shows that, as it stands, the coupled traffic-emission model does not allow a satisfactory estimation of the emissions of CO2, NOx and PM10 pollutants. Besides, the respective contributions of reservoirs to the global emissions do not follow the trend described by ATMO, with reservoirs having their contribution either higher or lower compared to ATMO measurements. Finally, a third simulation was to compare the influence of the spatial division of the field of study in the estimation of pollutant emissions. The ring road having drastically different traffic conditions compared to the urban environment, it seems interesting to study a division of the Lyon metropolitan area into 10 reservoirs, the ring road being isolated to form the 11th one. This 3rd coupled simulation was prepared based on the 2018 data. However, the simulation of the model coupled with this last division could not be finalized in time. To complete the analysis, a planned follow-up of the work presented would consist in carrying out the calculations of the coupled traffic-emissions model on this new "10 reservoirs + peripheral" division and in comparing the results with those of the "10 reservoirs" division obtained in this study.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-03184716
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Submitted on : Monday, March 29, 2021 - 5:33:27 PM
Last modification on : Thursday, May 6, 2021 - 6:17:39 PM
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Amélie-May Lupinski. Pertinence d’un modèle couplé trafic et émission de polluants utilisant une approche agrégée de modélisation du trafic à l’échelle urbaine pour l’évaluation environnementale. Sciences de l'ingénieur [physics]. 2019. ⟨dumas-03184716⟩

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