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

IF 7.4 2区 工程技术 Q1 ENGINEERING, CIVIL
Chao Gao , Jinliang Xu , Miao Jia , Zhenhua Sun
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Abstract

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.

碳排放、车辆耗油量与高速公路限速之间的相关性
本文旨在研究碳排放、油耗和限速之间的相关性。根据能量守恒定律推导出了一个理论模型,表达了车辆油耗与速度之间的关系。随后,通过实地测试共收集了 40 组油耗数据,以验证理论模型在不同车速和不同道路纵坡组合下的准确性。然后,根据政府间气候变化专门委员会(IPCC)规定的碳排放系数,将油耗转换为碳排放。在现场实验中,选择了在中国高速公路上最常见的轿车和卡车两种类型。最后,通过之前建立的模型得到了不同限速条件下的行驶速度,并计算了不同车型在不同限速条件下的碳排放变化。结果表明,限速对油耗和碳排放有显著影响。当限速从 80 公里/小时提高到 120 公里/小时时,平均车速增加了约 21%-27%,油耗和碳排放量增加了约 33%-38%。另一个有趣的结果是,车辆的油耗和碳排放只受速度影响。研究结果探讨了车速限制对碳排放的影响,为道路管理者制定合理的车速限制提供了证据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
13.60
自引率
6.30%
发文量
402
审稿时长
15 weeks
期刊介绍: The Journal of Traffic and Transportation Engineering (English Edition) serves as a renowned academic platform facilitating the exchange and exploration of innovative ideas in the realm of transportation. Our journal aims to foster theoretical and experimental research in transportation and welcomes the submission of exceptional peer-reviewed papers on engineering, planning, management, and information technology. We are dedicated to expediting the peer review process and ensuring timely publication of top-notch research in this field.
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