Effect of speed humps on instantaneous traffic emissions in a microscopic model with limited deceleration capacity  

作　　者：胡宇晨 李启朗 刘军 王君霞 汪秉宏 Yu-Chen Hu;Qi-Lang Li;Jun Liu;Jun-Xia Wang;Bing-Hong Wang(School of Mathematics and Physics,Anhui Jianzhu University,Hefei 230601,China;School of Civil Engineering and Transportation,Northeast Forestry University,Harbin 150040,China;Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]School of Mathematics and Physics,Anhui Jianzhu University,Hefei 230601,China [2]School of Civil Engineering and Transportation,Northeast Forestry University,Harbin 150040,China [3]Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China

出　　处：《Chinese Physics B》2024年第6期413-420,共8页中国物理B（英文版）

基　　金：funded by the National Natural Science Foundation of China (Grant No. 11875031);the key research projects of Natural Science of Anhui Provincial Colleges and Universities (Grant No. 2022AH050252)。

摘　　要：As a common transportation facility, speed humps can control the speed of vehicles on special road sections to reduce traffic risks. At the same time, they also cause instantaneous traffic emissions. Based on the classic instantaneous traffic emission model and the limited deceleration capacity microscopic traffic flow model with slow-to-start rules, this paper has investigated the impact of speed humps on traffic flow and the instantaneous emissions of vehicle pollutants in a single lane situation. The numerical simulation results have shown that speed humps have significant effects on traffic flow and traffic emissions. In a free-flow region, the increase of speed humps leads to the continuous rise of CO_(2), NO_(X) and PM emissions. Within some density ranges, one finds that these pollutant emissions can evolve into some higher values under some random seeds. Under other random seeds, they can evolve into some lower values. In a wide moving jam region, the emission values of these pollutants sometimes appear as continuous or intermittent phenomenon. Compared to the refined Na Sch model, the present model has lower instantaneous emissions such as CO_(2), NO_(X) and PM and higher volatile organic components(VOC) emissions. Compared to the limited deceleration capacity model without slow-to-start rules, the present model also has lower instantaneous emissions such as CO_(2), NO_(X) and PM and higher VOC emissions in a wide moving jam region. These results can also be confirmed or explained by the statistical values of vehicle velocity and acceleration.

关 键 词：traffic emissions speed humps slow-to-start rules deceleration capacity 

分 类 号：U491[交通运输工程—交通运输规划与管理]