Research On Expressway Guide Signs Layout In Shanxi Province

With the continuous improvement of the expressway in Shaanxi Province, the network layout is becoming more and more complex。The current national standards and norms have not meet the needs of the expressway guide signs setting layout requirement. The setting of the expressway guide signs is becoming more and more prominent. This paper studied the setting technology of expressway route guidance sign in Shaanxi province.First of all, according to the Current situation investigation and questionnaire survey, this paper current analyzed and summed up problems and the causes of expressway guide signs layout in Shaanxi Province.Secondly, it researched the improvement theory separately aiming at the existing problems of the expressway guide signs on setting position, guide information and supporting mode. On aspect of locating, based on driver’s traffic signs visual cognition process, tit analyzed and calculated the vertical and horizontal visibility space of expressway guide signs, and the separation distance for non-execution and execution expressway guide signs. And for guide information, based on the location of the urban, it divided expressway into two types: between urban and connected with urban, then analyzed drivers’ travel characteristics driving on different type expressway, and with the questionnaire result, it researched on the demand of guide information for different expressway to optimize expressway guide signs information classification and selection methods. On aspect of support mode, it draw on the experience of Shanxi Province and gave the application condition for different modes.Thirdly, it established the evaluation list and evaluation system for expressway guide sign, and based on Set Pair Analysis constructs the set evaluation model.Finally, choosing Qujiang interchange and the main line of bypass expressway in Xian as an example, using the evaluation model evaluate the situation of the route guidance sign setting effect, an optimization example is given for the existence of the problem.