The Effect of Pavement Roughness on Fuel Efficiency for Passenger Cars in Korea

The analysis of fuel consumption due to pavement roughness becomes more important in the economic aspect as well as the environmental aspect related to greenhouse gas emissions. Because vehicle operating costs and carbon dioxide emissions are increased by fuel consumption growth if pavement roughness increases. Therefore, it needs to analyze the change of fuel consumption for vehicles due to roughness in order to maintain pavement and greenhouse gas emissions efficiently. In this study, the amount of fuel consumption due to degree of roughness is measured by using two quantitative values such as voltage signal from fuel injector of vehicle and the speed from GPS. As the results, it was found that the fuel consumption increases with the rate of 100 mL/100 km as IRI increases with rate of 1 m/km.