Study On Traffic Impact And Traffic Organization Of Subway Construction Area

With the acceleration of urbanization in China and the number of urban motor vehicles is increasing,the city road traffic pressure is increasing day by day.Because subway has the characteristics of fast,punctual,large capacity,energy saving and environmental protection,more and more cities choose to develop subway to relieve the ground traffic pressure.However,due to the long construction time and wide construction scope of the subway project,it takes up a lot of road resources for a long time during the construction period.The roads around the subway construction area are prone to large-scale traffic congestion,which has a great impact on urban ground transportation.Therefore,by analyzing the impact of subway construction on the surrounding traffic environment,combined with theoretical knowledge,formulate a scientific and reasonable traffic organization scheme,which has certain guiding significance for alleviating the traffic congestion caused by construction and improving the service level of the road.This paper combines theoretical analysis with field investigation.Firstly,different construction methods of subway engineering are studied,the characteristics of various construction methods are analyzed,the advantages and disadvantages and application scope of different construction methods are compared,the forms of roads occupied by different construction methods are classified and discussed;Secondly,it deeply analyzes the specific impact of subway construction on urban road traffic facilities and traffic operation factors,studies several important factors that affect the capacity of urban roads,and further explores the influencing factors of the road capacity in the subway construction area are discussed,and puts forward the analysis model of signal intersection capacity in subway construction area;Finally,the average delay time is used as a measure to evaluate the service level of the intersection.Taking Qinglongsi Station of Xi’an Metro Line 5 as an example,this paper collects the road information and traffic flow parameters of the subway construction area through field investigation,calculates the traffic capacity and delay time of the intersection during Subway Construction by using the theoretical knowledge of traffic engineering,traffic management and control,and analyzes and evaluates the service level of the intersection according to the results.According to the current situation of road traffic,this paper puts forward the optimization scheme of signal timing,as well as practical and feasible traffic diversion schemes such as no left intersection,traffic guidance,setting traffic signs,etc.,so as to fully explore the surrounding road resources,relieve the traffic pressure of construction section,and improve the overall efficiency of road network.