An Ecoindex to measure the driving style and its influence on vehicle fuel consumption and CO2 emissions

Road transport is a major contributor to environmental pollution and driving style is one of the most significant among factors in the environmental impact of a vehicle. In the past two decades a new driving style, called eco-driving, has been developed to reduce CO2 emissions in driving and nowadays it is a climate change initiative not to be overlooked. CTL (Centre for Transport and Lo-gistics) has developed an innovative tool to acquire data from vehicles and to measure car fuel con-sumption and emissions on the road. In order to quantify the driving style influence on CO2 emis-sions CTL also developed an analytic method working with the acquired data and based on eco-driving rules. A large on road campaign (10 cars, 270 drivers, 120.000 km) was made using such tools and meth-ods. CO2 emissions as a function of average speed of the route measured in the campaign overlap on COPERT specific CO2 –speed function based on the EEA emission inventory. If all the monitored drivers had adopted the eco-driving driving-style CO2 emissions would have been up to 30% lower than the measured average at the typical urban speed (between 10 and 40 km/h on average) which is where the driver influence is higher.