Study On Technology Of Emergency Traffic Organization For Regional Road Network Under Sudden Events

Due to the randomness and damaging to normal traffic of sudden events in highway traffic, it well cause a decline in road capacity or a temporary increase in traffic demand in case of accident, leading to traffic congestion, accidents. It's not only cause highway operation efficiency to reduce, but also cause more threat to highway operation safety, even derive the second traffic accidents, and cause great damage to the traffic flow and the environment. In order to reduce the influence of highway traffic accident and reduce harm degree of traffic accident, prevent the second accidents, it is necessary to do the emergency traffic organization after accidents.The papers statistical analyze the accidents of highway network by access to historical date, divide type of sudden events, and analyze the highway emergencies impact on traffic safety and efficiency. The papers evaluate the highway reliability and efficiency under the sudden events. Depending on the impact and scope of sudden events, the papers provide optimized emergency traffic organization strategy in the emergency process.First, determine the scope of papers through statistical analysis and division of emergency type. Through scenario comparison, statistical analysis and other methods, analyze the effect on traffic safety and efficiency that cased by highway emergency (include fog, rain and snow weather or traffic accident).Then, the papers study on network performance evaluation, make the evaluation index system, and set out the principles of index system and the specific meaning of the indicators. Furthermore, focus on the relationship between the network flow and reliability of traffic time, the papers research qualitatively in terms of the relationship between traffic flow and running time on the road network.Finally, the papers research the regional road network traffic organization of emergency technical under emergencies, and proposed a way to manage network, and construct the framework of regional road network emergency traffic organization. Besides, the papers focus on the organization technical methods, application environment and adaptation, which the organization techniques include:signal control, speed and vehicle distance control technology, the main line control, ramp control, and traffic guidance technology.