Study On Traffric Organization In ReConstruction And Extension Work Zone Of Expressway

The highway which were builded in the nineties Twentieth century is now close to or more than the design life. Traffic on some highways has exceeded the design capacity, there has been traffic congestion and road embankment damage and so on. Therefore, the highway expansion is the main task of road construction and urgent problem, in order to service economic and social activities. It is the highway science and technology workers concerns and solve problems, during the renovation and expansion, how to protect the safe passage of vehicles and not excessive reduction of the construction area capacity.Basing on the analysis of relevant research results, this paper summarize the features of various reconstruction programs, define the work area which is also rebulided, and study the traffic flow characteristics using statistical analysis and traffic engineering principles. Basing on analysing the influence factors of traffic organization program, this paper propose the point level, line level and surface level three levels of traffic flow organization methods, and the reconstruction area traffic parameter design method, basing on the project, study the traffic organization program during reconstruction. VISSIM simulation software was used to establish the simulation model of road network and basic sections, basing on the actual traffic date, verify and modify the traffic flow simulation program, and obtain the optimized organization program.The research results is reference value to the reconstruction area traffic flow organization, it is important to improve the traffic capacity and ensure traffic safety of the reconstruction area.