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基于动态视认性的隧道V型反光环夹角设置研究
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作者 陈保祥 郭灯 +3 位作者 郑号染 雷凯婷 黄婷 杜志刚 《公路》 北大核心 2022年第7期288-292,共5页
为在保障隧道空间路权的前提下,提高V型反光环在动态驾驶环境下的视认性,在对行车条件下驾驶员对反光环视认过程进行分析的基础上,结合现行规范中有关不同等级公路隧道建设参数及限速标准的规定,对V型反光环合理夹角设置标准进行研究。... 为在保障隧道空间路权的前提下,提高V型反光环在动态驾驶环境下的视认性,在对行车条件下驾驶员对反光环视认过程进行分析的基础上,结合现行规范中有关不同等级公路隧道建设参数及限速标准的规定,对V型反光环合理夹角设置标准进行研究。发现:V型反光环夹角设置大于32°时,其视线诱导功能无法有效发挥,为对驾驶员进行合理诱导,其夹角设置应控制在25°~32°范围内;为了反光环制作、施工单位及交通部门统一管理,隧道V型夹角可设置为25°或30°,建议优先设置为25°。本研究在保障隧道空间路权并且降低后期运营养护成本的同时,提高了V型反光环对驾驶员的有效诱导作用,为V型反光环设置应用提供了理论支撑,促进隧道交通安全与节能的协调统一。 展开更多
关键词 交通工程 交通标志标线 V型反光环 反光环夹角 动态分析
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高速公路施工区限速标志位置确定方法 被引量:26
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作者 于仁杰 马荣国 +2 位作者 韩海 阎莹 王俊凌 《交通运输工程学报》 EI CSCD 北大核心 2013年第5期91-98,共8页
根据驾驶人的视认性和短时记忆理论,分析了限速标志影响下的驾驶人自适应性和车辆的易操控性,计算了高速公路施工区内限速标志的前置、后置和重复距离。基于高速公路施工区长度划分计算模型,考虑了车辆排队长度、驾驶人短时记忆以及重... 根据驾驶人的视认性和短时记忆理论,分析了限速标志影响下的驾驶人自适应性和车辆的易操控性,计算了高速公路施工区内限速标志的前置、后置和重复距离。基于高速公路施工区长度划分计算模型,考虑了车辆排队长度、驾驶人短时记忆以及重复距离等因素,提出了高速公路施工区限速标志位置确定方法,并运用VISSIM仿真软件进行实例验证。仿真结果表明:在最低限速为40km·h-1、大车混入率为40%条件下,当交通量为1 400pcu·h-1时,一、二、三级限速标志的最小冲突率分别为0.06、0.10、0.21次·m-1,最大冲突率分别为0.56、0.14、0.23次·m-1;当交通量为1 960pcu·h-1时,三级限速标志的最小冲突率分别为0.84、0.28、0.36次·m-1,最大冲突率分别为0.87、0.31、0.40次·m-1;当交通量为2 240pcu·h-1时,三级限速标志的最小冲突率分别为0.72、0.31、0.39次·m-1,最大冲突率分别为0.74、0.34、0.48次·m-1。 展开更多
关键词 交通安全 高速公路施工区 限速标志 视认分析 前置距离 后置距离
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Evaluation of Rural Tourism Resources based on the Tourists Perspective: A Case Study of Lanzhou City, China 被引量:3
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作者 PU Lili LU Chengpeng CHEN Xingpeng 《Journal of Resources and Ecology》 CSCD 2022年第6期1087-1097,共11页
Rural tourism has become a hot spot in China’s tourism development. Based on the AHP model and the comprehensive evaluation method of fuzzy cognition, this paper builds an evaluation system for the evaluation of rura... Rural tourism has become a hot spot in China’s tourism development. Based on the AHP model and the comprehensive evaluation method of fuzzy cognition, this paper builds an evaluation system for the evaluation of rural tourism resources, including resource value, environmental factors, reception conditions with three criterion layers, and 25 evaluation factors. We recovered 574 valid questionnaires through two online forms and field research in Lanzhou city, and then used them to complete the empirical analysis. The results show four main aspects of the tourists’ perspective on rural tourism resources. Firstly, rural tourists are concerned about higher service facilities. The evaluation of rural tourism resources pays more attention to the reception conditions, and tourists pay more attention to the facilities of the reception conditions. In addition, the reception condition value accounts for a more concentrated 8–10 points(61.4%), which is higher than environmental elements(58.87%) and the value of the resource itself(54.26%). Secondly, tourists’ attention to rural tourism resources mainly focuses on the pleasurable(0.1152), tour line design(0.1014), experience(0.0765), ornamental(0.0747) and other aspects. Thirdly, the degree of cognition mainly focuses on nature(4508), environmental safety(4469), pleasantness(4387), accommodation conditions(4367), tour line design(4363) and other aspects of the rural tourism resources. Fourthly, the cognition of rural tourism resources is basically given priority with 6–9 points, and environmental factors accounted for the highest portion. However, rural tourists have higher expectations for the popularization and education of rural tourism resources, but the sense of acquisition is relatively low. Through the further improvement and improvement of the naturalness of environmental resources, environmental safety of reception conditions, and the enjoyment of external traffic and resource value, the overall benefit of rural tourism resources is maximized. The results of this study can provide reference for the theoretical foundation of rural tourism resources. 展开更多
关键词 rural tourism resources RECOGNITION tourist perspective AHP Lanzhou City
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