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Correlation between carbon emissions,fuel consumption of vehicles and speed limit on expressway

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This paper aimed to investigate the correlation between carbon emissions,fuel con-sumption,and speed limit.A theoretical model was derived based on the energy conser-vation law,which expresses the relationship between vehicle's fuel consumption and speed.Subsequently,a total of 40 sets of fuel consumption data were collected through field tests to verify the accuracy of the theoretical model at different speeds and different road longitudinal slope combinations.The fuel consumption was then converted to carbon emissions according to the carbon emission factors specified by Intergovernmental Panel on Climate Change(IPCC).In the field experiment,two types of cars and trucks,which are most common on the expressways in China,were selected.Finally,the travel speed under different posted speed limits was obtained through the previously established model,and the carbon emission changes of different vehicle types at different limited speeds are calculated.The results show that the speed limit has a significant impact on fuel con-sumption and carbon emissions.When the speed limit increased from 80 to 120 km/h,average vehicle speeds increased about 21％-27％,and fuel consumption and carbon emissions increased from approximately 33％-38％.Another interesting result was that the vehicle's fuel consumption and carbon emissions are only affected by speed.The results of the study explore the effect of speed limits on carbon emissions and provide evidence for road managers to set reasonable speed limits.

Vehicle carbon emissionVehicle fuel consumptionPosted speed limitAverage speedRoad longitudinal slope

Chao Gao、Jinliang Xu、Miao Jia、Zhenhua Sun

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School of Highway,Chang'an University,Xi'an 710064,China

Shaoxing Communications Investment Group Co.,Ltd.,Shaoxing 312000,China

Fundamental Research Funds for the Central Universities,CHDScientific Research Project of Zhejiang Provincial Department of Transportation

3001022121072020025

2024

10.1016/j.jtte.2023.02.007

交通运输工程学报(英文版)

交通运输工程学报(英文版)

CSTPCD
ISSN：2095-7564
年,卷(期)：2024.11(4)
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