Propose a model for predicting the vehicle fuel consumption in freeways

Studies show that of all petroleum products, a significant share (about 30%) is allocated to gasoline consumption; therefore proper management of vehicle fuel consumption can have positive effects on economic and environmental aspects. In the present study, in order to investigate the effect of the pavement roughness and the longitudinal slope on fuel consumption, the pavement roughness and the longitudinal slope of three freeways including Tehran-Saveh, Tehran-Karaj and Tehran-Qom freeways, were measured in one hundred sections using a road surface profiler. Furthermore, by installing a Bluetooth diagram on the test vehicle, the amount of the fuel consumption was recorded for each section. Statistical analysis of the data showed that the pavement roughness and the longitudinal slope increase the vehicle fuel consumption significantly. In this study, an equation was proposed to predict the fuel consumption of the vehicles on freeways. According to the proposed equation, Fuel consumption increases 2 percent when International roughness index increases 1m/km.