For some decades the air quality has received, both locally and globally, more and more attention from the scientific community and local authorities. It is well known that one of the major causes of pollution are vehicle emissions, and that they are closely related with driving style. According to studies that define vehicular emissions, it has been found that they contain a wide variety of pollutants, principally carbon monoxide and dioxide (CO and CO2), oxides of nitrogen (NOX ), particulate matter (PM10) and hydrocarbons (HC) or volatile organic compounds (VOC), which have a major long-term impact on air quality. This work describes the correlation between the traffic phenomena of road networks and the percentages of the major pollutants made by vehicle emissions.