考虑汉语句子阅读阈限的交通辅助标志字高设计

Research on Chinese Character Height of Traffic Auxiliary Signs Based on Threshold of Reading Chinese Sentences

为保障驾驶员对交通辅助标志的有效视认,运用实验方法,研究辅助标志字高设计。建模分析驾驶员对交通标志信息的视认过程,构建基于车速和字数的交通辅助标志字高模型;设计实验分析交通辅助标志汉字阅读阈限;根据阅读阈限,分别确定门架式和悬臂式两种交通辅助标志在不同速度和字数条件的最小字高要求,并与《道路交通标志和标线(第2部分):道路交通标志》(GB 5768.2-2009)进行比较分析。结果表明:(1)当辅助标志字数超过7个,不同字数句子的阅读阈限存在显著差异,阅读阈限的增速随字数的增加逐渐提高;(2)交通辅助标志的字高随车速和汉字字数的增加而增加;(3)国标(GB-5768)的字高设定对15字以内的辅助标志适用,对120 km/h道路中16字以上的长标志不满足阅读阈限要求。

To improve the comprehensibility of the traffic signs, Chinese character height of traffic auxiliary signs is studied by using experimental method. Firstly, the drivers’ recognition process of traffic signs are analyzed based on information processing model and the Chinese character height model based on speed and the number of characters is constructed. Then, the reading threshold of Chinese characters are analyzed by experiment. Finally, the minimum character height requirements of gantry type and cantilever type traffic auxiliary signs are put forward according to the reading threshold and speed. The results show that:(1)when the number of characters exceeds 7, there are significant differences in the reading threshold of Chinese sentences with different characters numbers, and the growth rate of reading threshold increases with the increase of the number of Chinese characters.(2)The Chinese character height of traffic auxiliary signs should increase with the increase of vehicle speed and the number of characters.(3) The character height setting of national standard(GB-5768) is applicable to the auxiliary signs within 15 characters and that is not applicable when the speed exceeds 120 km/h and the character number exceeds 16.