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针对高速公路作业区文字类交通标志在不同行驶速度、道路条件及标志的多信息量条件下对驾驶员视认特性的影响,其尺寸规格不尽统一对驾驶员形成的非一致性视觉感受,基于《道路交通标志和标线》的文字高度模型,结合高速公路作业区文字类交通标志信息特性,并以驾驶员的视认特性为出发点构建车辆行驶模型,设计了多文字标志信息视认试验,通过改进传统文字高度算法提出综合考虑行车速度、驾驶员视认特性以及标志牌信息量等因素的文字高度优化模型。研究结果表明:《道路交通标志和标线》对汉字的感知、阅读理解时间的取值是以单个汉字的视认时间为基础,通过多文字标志信息视认试验发现当标志牌文字数m≥6时,难以反映当前作业区多文字标志信息视认特性;优化的文字高度模型充分考虑标志牌多信息量时驾驶员的视认特性,文字高度取值相比“国标”更为合理、全面。在此基础上对标志尺寸进行优化设计,研究得到先采用优化的文字高度算法计算出汉字高度,再用“国标”中规定的汉字排版方式设计,这样既能保证视认性的要求,又能最大限度地利用标志牌版面,进而提出了高速公路作业区文字类标志尺寸的设计标准。
In view of the influence of the traffic signs of the writing type in the operation area of the expressway on the visual recognition characteristics of drivers under different traffic speeds, road conditions and signs under various information conditions, the non-uniform visual perception of the driver formed by the dimensions and specifications of expressways, Based on the text height model of “road traffic signs and marking”, combined with the characters of traffic signs in the writing area of the expressway, the vehicle driving model was constructed based on the driver’s visual recognition characteristics, and the multi-word sign information visual recognition test , A text height optimization model considering factors such as driving speed, driver’s visual identity and the amount of information of signboard is put forward by improving the traditional text height algorithm. The results show that the value of “road traffic signs and marking” for Chinese characters and reading comprehension time is based on the visual recognition time of single Chinese characters, and when the number of signs is m> 6 It is difficult to reflect the visual characteristics of the multi-text logo information in the current work area. The optimized text height model is more reasonable when considering the visual recognition of the driver with more information content than the national standard, comprehensive. On the basis of this, the size of the logo is optimized. The height of the Chinese characters is first calculated by using the optimized text height algorithm, and then the design of the Chinese typesetting method specified in “GB” is adopted to ensure the requirement of visual recognition, But also to maximize the use of sign board layout, and then put the highway operating area text class logo size design standards.