Emission characteristics of highway traffic accident congestion based on traffic simulation
WU Qingqing
YU Xue
GAO Chao
QI Rui
LIU Hualong
WANG Jian
Abstract：To analyze the emission characteristics of vehicle exhaust pollutants under congested highway traffic conditions caused by traffic accidents,microscopic simulation software VISSIM is used to simulate vehicle operation data under both congested and smooth traffic conditions on highways.The vehicle specific power(VSP)-based emission calculation model is employed to compute the exhaust emissions of different vehicle types under these two conditions,and a comparative analysis is performed.The accuracy of the VSP-based emission calculation results is verified using the motor vehicle emission simulator(MOVES).The results show that:under congested conditions,the exhaust emissions of vehicles during acceleration are higher than those during deceleration and idling;The emissions of CO,NOx,HC,and CO2 under congested traffic conditions are approximately 1.86,1.86,2.15,and 2.01 times higher,respectively,than those under smooth traffic conditions.The emissions under highway traffic accident congestion are significantly higher than under smooth conditions;the calculation results of the two models for the four types of exhaust pollutants are relatively close,with a small relative average deviation.
Keywords：highwaytraffic accidentcongestionexhaust emissionmicroscopic simulationVSP
Publication Date：2024-09-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 26-30,68 )