Study On Monitoring Method Of Vehicle Emission On Urban Road Network

In recent years,with the rapid increase of the ownership of motor vehicles and road traffic volume,the emissions caused by traffic has been increasing sharply and traffic emissions have become one of the important reasons for air pollution.Under this premise,this paper has studied on vehicle emissions in intersections,and the main research contents of this dissertation included:(1)Analyzed the present situation of vehicle emission pollution and the harm degree of motor vehicle emission pollutants and Identifies the vehicle emissions monitoring projects as CO,VOC,NOX,PM10,SO2 and PM2.5.The various models of vehicle emission factors has also been analyzed and divided into four kinds of vehicles as light vehicle,medium vehicle,truck and bus.(2)When research on the vehicle emission rules of intersection,considering the influence of signal control on emission and analyses the driving characteristics of the vehicles at the intersection comprehensively.The vehicle emission at intersection is divided into two types:signal control intersection and no signal control intersection to build the vehicle emission monitoring model at intersections.The emission simulation model of signal control intersection is built based on VISSIM simulation software to test the model can be used to monitor the emission of pollutants at intersections.(3)When research on the vehicle emission rules of section,analyses the driving characteristics of the vehicles on road sections comprehensively.The model of vehicle emission monitoring in peak period and off-peak period is established due to the different traffic behavior of vehicles during peak and off-peak periods.Then using VISSIM to verify the feasibility of road vehicle emission monitoring model.(4)According to the characteristics of urban road network and the influence factors of traffic quality,the combined model of urban road network vehicle pollutant emission monitoring was established,and taking comprehensive measurement of vehicle emissions to reflect the comprehensive effects of all vehicle pollutants.At last,take road network of Gulou District of Nanjing city north area as an example to utilize the monitoring model.