Enhancement of international competitiveness, support of local living, serviceable highways, driving comfort, etc. Road not only sustains the economic activities, but plays the role of a local lifeline as well. Thus it is required to develop road network with the appropriate service level according to the needs. We study the concept for serviceable road network with reference to overseas standards of road structure and networks. Speed limit in various countries Source: “Study on performance indicator for expressways”, Road bureau of Ministry of Land, Infrastructure and Transport, 2003 Image of smart IC Source: “Research on road network development and usage” National Institute for Land and Infrastructure Management, 2004 Image: Hometown discovery route Source: “Basic research for desirable road policy in line with the trend of the current socioeconomy”, Mar. 2006, Economic Research, Traffic Survey and Census Office of Planning Division, Road bureau of Ministry of Land, Infrastructure and Transport and PPPS