In this contribution, we
present an evaluation of different mitigation plans to improve NO2 levels in Andalusia, a region in the south of Spain. Specifically, we consider
four possible mitigation plans: the effects over NO2 concentration
of apply changes in the distribution of Vehicles Park; the effect of realize
traffic restrictions (affecting to the density flow of vehicles) over highways
and main roads; the effect of replacement of diesel use by natural gas in urban
areas; and the effect of applying new velocity limits to access to urban areas.
A sophisticated air quality modelling (AQM) system has been used to evaluate
these mitigation plans. AQM implemented is composed on WRF meteorological
model, an emission model created by the authors and CMAQ photochemical model.
AQM analyzes mitigation plans during fifteen episodes of 2011 where NO2 levels were the highest of the year; so we analyze the effect of mitigation
plans in worst conditions. Results provided by the AQM system show that: 1-h
maximum daily NO2 is reduced to 10μg.m-3 near circulation roads when traffic restrictions and velocity limits plans are
applied (NOx emissions are reduced in 9% - 15%); 1-h maximum daily NO2
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