This case study explained the korea expressway’s ex-post evaluation that focused on the direct and indirect effects of expressway, constructed for 40years. Expressway has been the foundation of South Korean economy and society since 1970. But there was a few research of the various effect of expressway. This case study tried to qualitatively analyze the direct and indirect effects of expressway. This case study suggested the expressway’s various effects separated by a 10year from 1970 to 2010 and calculated the monetary value of expressway network by transport network analysis. Also, it suggested the SA(Service area) of express network from 1970 to 2010 by ArcGis’s IDW methodology. Especially, the regional and industry development effect of expressway was calculated in this study by adapting the function of Cobb-Douglas production.