Decision-making mechanism of urban highway scales from the perspective of government

According to the economic ideas of Garys Becker, this paper built the decision-making model of urban highway scales from the perspective of government who supplied urban highways under funds constraint, and got the equilibrium condition of urban highway scales. Then with the figure analysis, the paper discusses impact mechanism of the several factors such as the visibility of urban highways, invalid traffic, construction modes of urban highways. I hope this study can give a help to not only alleviate urban traffic congestion but also improve the efficiency of urban highways.