Combining microscopic traffic modelling and 3 pollutant emission modellings to assess modifications of traffic supply and demand

摘要

Traffic management definition and assessment strategies rely on results fromsuccessive stages of modelling: from traffic to air pollution concentrations. Theobjective of this study was to improve this modelling process. Combiningmicroscopic traffic modelling and 3 pollutant emission modellings was performed:two using aggregated traffic estimates (HBEFA, Copert) and the other usingvehicle trajectory (Phem). The studied area is part of the Lyon urban area (6,2 km2,2091 road sections). Traffic and emissions were simulated for 16 scenario resultingfrom modifications of supply or demand (traffic calibration on the afternoon rushhour). Copert and HBEFA estimations show many similarities and differences withPhem. Ranking of scenarios on the basis of their variation to the reference wasperformed and analysed. Copert and HBEFA provide the same ranking. To focus onthe analysis of two scenarios, difference of NOx emissions per link were maped(only the higher variations). The relevance of dealing with both the network andthe links spatial scales to assess the impact of the scenario was clearly shown.