Análise dos impactos decorrentes da redução de velocidade regulamentar sobre a emissão de poluentes veiculares

Abstract

The objective of this work is to analyze the effects resulting from the change in the regulatory speed on the emissions of vehicular pollutants on urban roads. This is due to the fact that the transport system is the most responsible, among the energy sector, for atmospheric pollution. In view of this, measuring the effects that these interventions in traffic cause on CO_2 emissions, with data based on real traffic conditions, makes it possible to improve local air quality and human health. For this, comparisons of CO_2 levels were made for the context of regulatory speed equal to 60 km/h (data group 1) and 50 km/h (data group 2), in general and in different periods of intensity of the traffic, on Avenida Jovita Feitosa located in the city of Fortaleza – CE. Being, data group 1, characterized by the scenario prior to the regulatory speed change, which proceeded from a database and data group 2, collected with equipment on board a flex-fuel vehicle with the variables observed at a frequency of 1 Hz. The results were obtained through descriptive analyses, construction of conduction cycles and graphic elaborations. In this way, for the reduction of 16.67% of the regulatory speed, the average accelerations were reduced by 9.1%, which can be attributed to the less aggressive driving behavior. Average CO_2 emissions were reduced by 3.5% with the impacts being more prominent in the period of lower traffic intensity with the reduction in average CO_2 emissions by 7.2%. Finally, useful analysis tools were established for decision making and strategic definitions of operation and local traffic planning based on the assessment of local air quality.