Research On Safety Analysis And Traffic Organization Of Work Zone

With the development of road infrastructure in our country, China’s highway mileage has increased year by year, the service life of highway is also gradually increased. With the development of social economy, highway demand and traffic flow has increased rapidly. Therefore, China’s highway extension construction and maintenance overhaul construction increases year by year. Highway extension and maintenance works are usually using lane construction method, remained in road traffic state. Because of the existence of lane assignments, traffic capacity of operation area will be affected. Lane assignment area may also cause road bottleneck area, at the same time comp licate traffic environment, and make more prone to traffic accidents.This thesis aims to study the road work zone traffic safety and traffic organization, explores the influencing factors of traffic safety of lane operation area, evaluates safety risk of road work zone, analyzes the setting methods of traffic organization and traffic safety facilities, and provides a theoretical basis for lane construction and maintenance work.Firstly, the foreign and domestic traffic accidents on the lane operation area are analyzed. On this basis, the traffic safety situation of lane assignment area in China is summed up. Then risk factors affecting the traffic safety of lane operation area are explored through data collection and investigation of lane operations department and construction-maintenance enterprises. To evaluate the risk factors of our country, AHP method is used to construct evaluation model. At the same time, through field observation of traffic lane assignments, work zone traffic flow characteristics are analyzed, and based on this analysis quantitative method of work zone safety risk is developed.This thesis studies the six main length layout parameters of lane assignment area, and proposes the corresponding calculating method, which can be used to guide function area layout of lane operation area under different conditions. On the other hand, through the construction of driver’s psychological and cognitive model, this thesis puts forward traffic sign setting method of lane assignment area, and key parameters(e.g. the traffic signs in front of distance and distance reset) calculation method. Combined with other safety protection facilities of operation area, this thesis proposes the general situation of traffic safety facilities and road work area layout scheme.