Study On Highway Construction Projects On The Value Of Flow

China has experienced a fast growing period of highway construction in recent years, but the dynamic development of China's economy can not be satisfied and highway is still the bottleneck. Economic limitation is the main reason leading to the inadequate supply of highway. Meanwhile, something missing in theory also gives a lot of troubles to the practice, especially the feasibility study and project selection methods.In order to make the full use of the investment in highway construction, It is necessary to make the reasonable evaluation when making the decision. This paper suggests to taking an overall view to judge a project. Based on the Value, Value-Chain and Value flow theory, study the flow of highway construction investment value, the value of investment in highway operators and road transport value stream flow and circulation of traffic laws and use of input and output method of measurement and production Its contribution to the value of the national economy.In this paper, from the theory to study the highway construction projects and the national economy's the value of sports departments, so as to improve investment efficiency in the use of highway, seeking the best investment, improve highway transport maximum contribution to the national economy provide the basis for its significant .