No. 1184
	Current Situations and Problems on Fail-safe Design and Risk Management in various cases of Road Traffic Information Infrastructure
	Investigation Committee on Fail-safe Design and Risk Management for Road Traffic Information Infrastructure
	Keyword : Road traffic information infrastructure, Fail-safe, Fault-tolerance, Risk management
	In recent years, there are various kinds of needs in roads. Not only the road itself such as civil engineering structures and bridges but also the road traffic information infrastructure, consisted of the electric power supply system and the information network system, has more important roles. On the other hand, it is operated so continuously that it is required to improve the safety and reliability of the total system and manage the risk control perfectly. Investigation Committee on Fail-safe Design and Risk Management for Road Traffic Information Infrastructure mainly investigated the current situations and problems from the viewpoint of "Fail-safe and Risk management" for Road Traffic Information Infrastructure, for two years from April 2007 to May 2009. This committee investigated the causes of the troubles and mistakes in the operation of the road traffic information infrastructure, and the condition of fail-safe and fault-tolerance in the stages of planning, construction, operation, maintenance and repair. Then, the committee tried to clarify the current problems on the road traffic information infrastructure from the viewpoint of fail-safe and risk management and surveyed what it should be. In addition, the committee investigated the points to introduce the new function of ITS Technologies. This report summarizes the outcomes of this investigation and discussion.
	©2007. The Institute of Electrical Engineers of Japan