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Environmental assessment of low speed policies for motor vehicle mobility in city centres / J. Casanova, N. Fonseca

Casanova Kindelán, Jesús ; Fonseca González, Natalia, co-autor

Global NEST Journal. - Vol. 14, n.o 2 (2012) , p 192-201

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In order to assess the influence of reducing the speed limit from 50 km h-1 to 30 km h-1 in one-lane streets in local residential areas in large cities, real traffic tests for pollutant emissions and fuel consumption have been carried out in Madrid city centre. Emission concentration and car activity were simultaneously measured by a Portable Emissions Measurement System. Real life tests carried out at different times and on different days were performed with a turbo-diesel engine light vehicle equipped with an oxidizer catalyst and using different driving styles with a previously trained driver. The results show that by reducing the speed limit from 50 km h-1 to 30 km h-1, using a normal driving style, the time taken for a given trip does not increase, but fuel consumption and NOx, CO and PM emissions are clearly reduced. Therefore, the main conclusion of this work is that reducing the speed limit in some narrow streets in residential and commercial areas or in a city not only increases pedestrian safety, but also contributes to reducing the environmental impact of motor vehicles and reducing fuel consumption. In addition, there is also a reduction in the greenhouse gas emissions resulting from the combustion of the fuel. [Do autor]

petróleo; transporte urbano; automóvel; poluição; veículo motorizado; circulação urbana; combustível fóssil; regulamentação da velocidade; Madrid

28.46 URBANISMO E CONSTRUÇÃO CIVIL

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