A Method for Specifying the Weights of Evaluation Indexes for Design Schemes of Landside Signs at Airports Based on Driver Satisfaction
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摘要: 机场陆侧交通标志对驾驶人及时、准确地寻找目的地至关重要,交通标志设计应充分考虑驾驶人对标志信息的满意度。为此,针对北京大兴国际机场陆侧交通标志,采用均匀设计法提出8组交通标志设计方案,基于叙述性偏好(SP)实验设计调查问卷,在线发放并回收了357份有效问卷,从中获取驾驶人对各组设计方案的满意程度。采用多元多项式回归分析方法,分析陆侧标志文字高度、文字间距、出口方向信息位置、地点信息底色这4种信息要素对于信息满意度的影响,进而采用主观评测法得到各信息要素的权重。采用专家打分法构造判断矩阵,进而运用层次分析法确定各信息要素的权重。将主观测评方法和层次分析法得到的权重结果进行验证比较。结果表明:随着文字高度增加、文字间距变大,地点信息底色与出口方向信息底色对比越明显,驾驶人对于标志的满意度也随之增加;同时,出口方向信息位于左侧时,驾驶人对于标志的满意度更高;基于层次分析法和主观测评法得到的各信息要素权重排序一致,均为:地点信息底色 > 文字高度 > 出口方向信息位置 > 文字间距。该结果可以为机场陆侧交通标志设计提供可靠参考。Abstract: Landside signs of airports are essential for drivers to find their destinations in a timely and convenient way. Therefore, drivers' satisfaction with traffic signs shall be fully considered during their design. Based on this, the design of the landside signs of Daxing International Airport in Beijing is taken as a case study, and the uniform design technique is used to develop eight design schemes. Based on a stated preference (SP) questionnaire, an online survey is carried out. A total of 357 valid questionnaires are collected from which driver satisfaction toward each scheme is obtained. Next, a multiple polynomial regression analysis technique is used to investigate the influences of the following four design elements (i.e., text height, text spacing, location of exit-information, and background color of location-information) on drivers' satisfaction toward landside signs, based on which a subjective evaluation method is adopted to select the weight of each design element. Further, an expert scoring method is used to develop a judgment matrix, based on which an Analytic Hierarchy Process (AHP) method is used to determine the weight of each element. The results from the subjective evaluation method and the AHP method are compared and verified. Study results show that drivers would have higher satisfaction when the height or the spacing of the text is high, or the contrast between the background color of location-information and exit-information is enhanced. In addition, when the information of exit directions is located on the left side, drivers also have a higher satisfaction. The ranks of weights of the four elements based on the subjective evaluation method and the AHP method are consistent, that is, background color of location-information > text height > location of exit information > text spacing. The results from this study can be used as a reference for enhancing the design of landside signs of airports.
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表 1 因素和水平
Table 1. Factors and levels
水平数 实验因素 文字高度/cm 文字间距 出口方向信息位置 地点信息底色 取值标准 数值/cm 1 40 20%字高 8 左 蓝色 2 50 40%字高 20 右 白色 3 60 60%字高 36 下 青色 4 70 80%字高 56 灰色 5 品红 6 橙色 7 紫色 8 绿色 表 2 均匀设计方案
Table 2. Uniform Design Experimentation
方案编号 文字高度/cm 文字间距 出口方向信息位置 地点信息底色 取值标准 数值/cm 1 40 40%字高 16 右 青色 2 50 80%字高 40 右 白色 3 70 80%字高 56 左 品红 4 60 40%字高 24 左 紫色 5 40 20%字高 8 下 灰色 6 60 20%字高 12 左 绿色 7 50 60%字高 30 下 蓝色 8 70 60%字高 42 右 橙色 表 3 问卷数据信度分析
Table 3. Reliability analysis of questionnaire data
Cronbach's α 项目个数 0.676 8 表 4 多元多项式回归模型偏相关系数表
Table 4. Partial correlation coefficient of multivariate polynomial regression model
模型 未标准化系数 标准化系数 t 显著性 B 标准误差 Beta (常量) -7.4620 1.221 -5.2620 < 0.001 Y1 0.516 0.012 4.600 6.242 < 0.001 Y2 0.256 0.127 1.213 8.631 < 0.001 Y3 0.361 0.052 3.126 6.285 < 0.001 Y4 0.722 0.064 6.532 5.321 < 0.001 表 5 判断矩阵标准度
Table 5. Standard degree of judgment matrix
标度Vm/Vn 含义 1 同等重要 3 稍微重要 5 较为重要 7 非常重要 9 极端重要 2,4,6,8 介于之间 表 6 判断矩阵
Table 6. Judgement matrix
因素 Z Y1 Y2 Y3 Y4 文字高度 Y1 1 5 1 1/3 文字间距 Y2 1/5 1 1/3 1/7 出口方向信息位置 Y3 1 3 1 1/3 地点信息底色 Y4 3 7 3 1 表 7 主观评测结果
Table 7. Subjective evaluation results
选项 平均综合得分 所占比例/% 地点信息底色 3.13 34.80 文字高度 2.76 30.70 出口方向信息位置 1.82 20.30 文字间距 1.28 14.20 -
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