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

作　　者：Chao Gao Jinliang Xu Miao Jia Zhenhua Sun 

机构地区：[1]School of Highway,Chang'an University,Xi'an 710064,China [2]Shaoxing Communications Investment Group Co.,Ltd.,Shaoxing 312000,China

出　　处：《Journal of Traffic and Transportation Engineering(English Edition)》2024年第4期631-642,共12页交通运输工程学报（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities,CHD(grant no.300102212107);Scientific Research Project of Zhejiang Provincial Department of Transportation,funding number 2020025。

摘　　要：This paper aimed to investigate the correlation between carbon emissions,fuel consumption,and speed limit.A theoretical model was derived based on the energy conservation 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 consumption 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.

关 键 词：Vehicle carbon emission Vehicle fuel consumption Posted speed limit Average speed Road longitudinal slope 

分 类 号：U471.23[机械工程—车辆工程] U491.9[交通运输工程—载运工具运用工程]