The issue is to be considered as the main problem, accident, critical of the country. Which cause the loss of all economic Society and quality of life by accidents may be caused by one or more factors, factor it. So there must be a cause of the accident, the search to identify the causes that lead to accidents to particular. In this research, presentation techniques to examine the accident to make them aware of factors affecting accidents and to improve road safety. By using the technique of analyzing tree failures (Fault Tree Analysis) is a technique to help find the causes of accidents cause the official step by selecting the initial accident event, then the underlying cause analysis by ranking cause of birth Unzen Butler.As a tree Analyse the factors that result in the most sutdoika car, underlying cause of starvation, accidents, each factor. Due to used this technique also has the limited statistical data, accident. Then use the theory of vague (Fuzzy set Theory) help to explain the importance of each factor from the opinions of the experts on the nature of probability of impact accident. Where the application of this technique is to help find the cause of the accident and offered guidelines to improve road safety.
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