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With China's rapid economic development, traffic demand is rapidly increasing the highway built early last century, there has been lack of capacity, service levels, has been unable to meet the needs of social and economic development. To this end, the expansion of the highway. During the renovation and expansion of capacity, not only during the construction of the expansion to play a huge role for the state to save huge amounts of money to play a great role in guiding and for the construction and management of highway renovation and expansion during construction, has a very important practical significance and Prospects sex. This article first traffic organization and the traffic characteristics of highway construction section. Brief summary of analysis Freeway Rebuilding selected based on the traffic organization plan for unilateral line and bilateral stitching two ways; due to changes in road conditions and traffic conditions in the construction section of the driving behavior of the driver and traffic flow characteristics of the construction section will have a profound impact, construction of sections of the driver, vehicle, road and traffic flow characteristics, laid the theoretical foundation for the capacity. Second, the classification of vehicles and vehicle conversion coefficient. Research vehicle classification method based on capacity analysis on the basis of the number of axes and wheelbase as the vehicle classification index, Euclidean distance, highway vehicles are divided into small cars, medium-sized cars and oversize vehicles three categories; proposed combination of micro and macro calculation of the standard vehicle conversion coefficient algorithm, suggest various models vehicle conversion coefficient: small cars to 1.0, a medium-sized car for 1.5, 2.5 oversize vehicles. Link capacity of highway construction again the focus of research. Based on the definition and analysis of the various factors affecting the construction link capacity concept, based on traffic - Following rate model approach, three methods based on sections of basic capacity correction analysis methods based on field measurement method. Which focus on using the flow capacity - Following rate model and gives the the capacity recommended value of the construction section of the construction period. Finally, to evaluate the service level of the construction section. On the basis of the evaluation to select the service level of the construction section, determine the saturation of the construction section, average speed, traffic density, the average travel delays of four indicators, dynamic comprehensive evaluation method to determine the level of service at all levels of evaluation threshold threshold limit value and dynamic evaluation function, service levels were evaluated based on the measured indicators of its highway construction section.
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