Effect of cold start and vehicle trip characteristics on spatio-temporal distribution of vehicle emissions

IF 3.1 3区工程技术 Q2 ENVIRONMENTAL STUDIES

International Journal of Sustainable Transportation Pub Date : 2023-01-22 DOI:10.1080/15568318.2022.2147109

Yun Jiang, Anran Liu, G. Song, Hang Yin, Zhiqiang Zhai, Yizheng Wu, Lei Yu

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引用次数: 0

Abstract

Abstract Quantifying the effect of light-duty vehicle trip characteristics and cold-start extra emissions (CSEEs) on the spatio-temporal distribution of vehicle emissions at the urban scale facilitates dynamic modeling of emissions and assessment of human exposure in denser settings. The results of Beijing demonstrate that cold starts and CSEEs are predominantly distributed in peak hours, especially morning peaks. A total of 80.8% of the morning peak trips are cold-start trips, and CSEEs account for 64.2%, 50.1%, and 8.3% of carbon monoxide (CO), hydrocarbon (HC), and nitrogen oxide (NO X ) in the winter morning peaks, respectively. The fraction of CSEEs for CO, HC, and NO X increases by 49.1%, 54.6%, and 36.7%, respectively, when trip length decreases from more than 35 km to less than 5 km. By converting 50% of the short automobile trips to non-motorized modes, CSEEs decrease by 12.9%, 13.4%, and 12.9% of CO, HC, and NO X of the entire road network. CSEEs are mainly distributed on local roads and minor arterials with high air pollution exposure for pedestrians and cyclists, accounting for 68.1% and 21.4%.

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冷启动和车辆行程特性对车辆排放时空分布的影响

摘要量化轻型车辆行驶特性和冷启动额外排放（CSEs）对城市范围内车辆排放时空分布的影响，有助于对排放进行动态建模，并评估密集环境中的人类暴露。北京的研究结果表明，冷启动和CSEs主要分布在高峰时段，尤其是早高峰时段。在冬季早高峰，共有80.8%的早高峰出行是冷启动出行，CSEE分别占一氧化碳（CO）、碳氢化合物（HC）和氮氧化物（NO X）的64.2%、50.1%和8.3%。当行程长度从35以上减少时，CO、HC和NOX的CSEs比例分别增加49.1%、54.6%和36.7% km至小于5 通过将50%的短途汽车出行转换为非机动模式，CSEE在整个道路网中的CO、HC和NOX分别减少了12.9%、13.4%和12.9%。CSEs主要分布在行人和骑自行车者空气污染暴露较高的地方道路和次要干道上，分别占68.1%和21.4%。

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来源期刊

International Journal of Sustainable Transportation Multiple-

CiteScore

8.90

自引率

2.60%

发文量

期刊介绍： The International Journal of Sustainable Transportation provides a discussion forum for the exchange of new and innovative ideas on sustainable transportation research in the context of environmental, economical, social, and engineering aspects, as well as current and future interactions of transportation systems and other urban subsystems. The scope includes the examination of overall sustainability of any transportation system, including its infrastructure, vehicle, operation, and maintenance; the integration of social science disciplines, engineering, and information technology with transportation; the understanding of the comparative aspects of different transportation systems from a global perspective; qualitative and quantitative transportation studies; and case studies, surveys, and expository papers in an international or local context. Equal emphasis is placed on the problems of sustainable transportation that are associated with passenger and freight transportation modes in both industrialized and non-industrialized areas. All submitted manuscripts are subject to initial evaluation by the Editors and, if found suitable for further consideration, to peer review by independent, anonymous expert reviewers. All peer review is single-blind. Submissions are made online via ScholarOne Manuscripts.