Research on the activity level of key diesel trucks in Tianjin based on the access control system

Abstract

Through the installation of an access control system for key vehicle enterprises in Tianjin, the real-time monitoring of heavy-duty diesel vehicles in use by key enterprises in Tianjin is carried out, and the information of heavy-duty diesel vehicles in Tianjin is counted, and the activity level is analyzed. The results show that the proportion of heavy-duty diesel vehicles used by key enterprises in Tianjin is about 10%; foreign vehicles accounted for 50%, of which Hebei accounted for 71%, most of which came from Tangshan City and Cangzhou City, accounting for 32% and 14% respectively; the change cycle of traffic flow is M-shaped, the peak of traffic flow is 9:00 and 16:00, and it is relatively stable at night; during the Spring Festival and the heavy pollution supervision period, the traffic volume decreased significantly by 50% and 30% respectively. The research of activity level can get the structure and use status of heavy-duty diesel vehicles in Tianjin, and provide effective data for emission inventory simulation and pollution control research.