| With the development of the highway traffic, the traffic accidents are also increasing constantly. The occurrence of the traffic accident is often a result of the multifactor function. The influence in factors such as the main body of the road, affiliated facilities, architectures along the line, surrounding environment etc. doesn't affect alone, but through mutual combination, causing the traffic participant to make false judgments and behaviors, and making the vehicle breaking away from the driver's control, then causing the traffic accident.The highway as the most important traffic infrastructure in the modern life and production, there are few bad traffic accidents that causes of the road environmental factor directly, the reason of this result is often because people have insufficient understanding of the road environmental factor, and emphasizing the human factor and vehicle factor excessively. The occurrence of a traffic accident is not merely caused by a certain independent factor in the three factors of people, car, road, it is often the result of two or three factors acting together. The key elements are interdepended, interacted and inalienable. Every key element has an influence on the road traffic system, this kind of influence is closely linked with other key elements at the same time.Though there are just a few traffic accidents caused by the bad road landscape directly, but it plays an important inducting role in the traffic accident, so the road landscape factor of the highway can't be ignored. The road landscape affects the driver's driving state and driving psychology directly, thus has an influence on the operation conditions of the vehicle. Through analyzing it can be proved that the good road landscape has an obvious influence on preventing road traffic accident, and on the other hand bad road landscape also has a corresponding influence on inducing traffic accident. Therefore, the road landscape plays an important role in reducing the traffic accident.While reviewing the current research situation of superhighway landscape evaluation and superhighway safety evaluation, through a longer period development, superhighway landscape evaluation and superhighway safety evaluation have already formed independent system of each other. Through the analysis of relevant theories and on-the-spot investigation of the road, we can find that the traffic accident has a close relation with the road landscape. But at present regarding the road landscape and road safety as one intact system to research the road landscape influencing the road safety definitely is very few both at home and abroad, thus the research on evaluation index system of road landscape affects the road safety has important theory value and realistic meaning.This text has explained the concept, characteristics, forming elements of the landscape, and has analyzed the visual characteristics of the road landscape at first, has utilized the theory of road traffic system researching the relationship between the road landscape and road safety, and make it to be a foundation of the evaluation research on the road landscape affects the road safety. Abased on the choice principle of the evaluation index, through the study on basic theory of the road landscape, from its angle of impact on road safety, clustering, filtering and examining the key elements that formed the road landscape by expert consultation, combing the analyzing method of composed elements to confirm the evaluating indexes and evaluating criterion, has put forward from the natural influencing factor, the project safety influencing factor and the human safety influencing factor three respects to establish the evaluation index system model; according to the road landscape characteristics to divide the whole road. Has analyzed the domestic and international evaluation methods on the road landscape and security relevant fields at present, has summarized the pros and cons of the methods, confirming to adapt the method of expert consultation and Fuzzy Analytic Hierarchy Process to evaluate the road landscape influencing the road safety and by programming to realize auto-calculating. And has took the highway from Antu to Erdaobaihe for example, using the evaluation index system and method that set up in this text to analyze then obtain the result of the evaluation. And proof-test by using GPS data and the accident numbers of recent years.The result of the evaluation has indicated, the evaluation index system that set up in this text can comprehensively response the influence on road safety of the road landscape, the evaluation method selected can not only make an quantitative analysis for the non- quantitative index, but it is also a collect mean that can make the subjective judgment of people to be objective descriptions. The result can reflect the actual conditions accurately and objectively, the method is easy and practicable, and can reflect the weakness of the road landscape, offering improving measures to the roads that has been built up already and providing decision-making basis to the roads that haven't been built, it has far-reaching meanings to the design, build, management, maintenance of the highway.
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