The Korea Expressway Corporation (KEC) has established a 10-year plan for developing nEXt freeway Traffic Management Systems(EXTMS) in 2008 and it has been developing the intelligent Freeway systems , EXTMS, just as good as the VII of USA, Smartway of Japan and Coopers of Europe. The KEC establishes vision as 5S-Highway (more Safe, more Sooner, more Smart, more Smooth, less Stress) and goal as 3-Free way and defines 6 EXTMS services and 14 service systems for implement the EXTMS. And KEC establishes the Master plan to implement EXTMS : The first Step is development of 5 systems to FTMS improvement and EXTEMS introduce(2009~2010). The second Step is development of 9 systems to EXTMS growth and System integration with FTMS(2011~2013). The last Step is development of 2 systems to advanced EXTMS and complete it. (2014~2018) According to the results of analysis, EXTMS effects are 5.6 millions dollars saving per year by providing real-time traffic information based on V2I communication, 8.9 millions dollars saving per year by reducing accidents. And congestion price is reduced 61 millions dollars saving per year.