为提高交通标志的视认性，促进道路交通安全，对指路标志视认性的影响因素进行了定量 研究。首先，基于人类工效学理论对评价指标进行分析，得到11 个指路标志视认性的影响因素，建立指路标志视认性的评价模型，采用定性评估与定量评价相结合的方法对模型参数进行标定。然后，在大量问卷调查的基础上，通过层次分析法得到了不同影响因素的权重值，结果表明标志的设置位置、遮挡情况、字型尺寸以及字数多少对其视认性的影响最为显著，且其权重值分别为0.140, 0.130, 0.127和0.106。最后，通过对南京市虎踞北路高架桥处的指路标志进行分析，验证了 该模型的合理性与可靠性。

In order to improve traffic sign recognition and promote traffic safety, a quantitative research was made to investigate the influence factors of guide sign recognition. Firstly, the evaluation indexes were analyzed based on ergonomics, an evaluation model of guide sign recognition was established, 11 kinds of influence factors were obtained and a method combining qualitative evaluation and quantitative calculation was used to calibrate the parameters. Secondly, on the basis of considerable questionnaire, weights of different influence factors were calculated through analytic hierarchy process. The experimental results show that setting position, occlusion area, font size and word number have the most significant influence on guide sign recognition, and the weights are 0.140, 0.130, 0.127 and 0.106 respectively. Finally, the rationality and reliability of the evaluation model were verified by an example of guide sign at the viaduct of Huju North Road in Nanjing.