ehicle routing).</p>
<p>The EmissV is an R package that estimates vehicular emissions by a top-down approach, the emissions are calculated using the statistical description of the fleet at available level (National, State, City, etc). The following steps show an example of the workflow for calculating vehicular emissions, this emissions are initially temporally and spatially disaggregated, and then distributed spatially and temporally to be used as input in numeric air quality models such WRF-Chem [@Grellet