Research on the evaluation and mechanism of socio-economic benefit of highway projects

Based on the theory of system dynamics,the paper analyzes the mechanism of socio-economic benefits of highway projects and establishes the system dynamics model of regional economic-highway development. Then taking Jinji(Tianjin—Jixian) Highway of Tianjin as an example,the errors of system simulation are tested,and the system dynamics model built is verified to be quite stable,which has a high performance. Through the comparison of simulation results with and without Jinji Highway,the paper simulates and predicts the socio-economic benefit of each year from 2003 to 2013. Thus the quantification evaluation of socio-economic benefit of highway project is realized and will provide the theory instructions for similar projects in the future.